SEGA Master System codes database

Ace of Aces
Cheat mode:
On the second title screen (the one with the airplane), after the Ace of Aces logo flashes, Press Up, Right, Right, Down, Down, Down, Left, Left, Left, Left, Up, Right, Down, Left.  The game will automatically go to the mission select screen, and "Cheat Mode" will be visible.  You will now have unlimited ammo.

Action Fighter
Cheat mode:
Enter one of the following codes at the name screen.

Letters A, B, C, D collected:
Enter "HANG_ON."
Invincible to bullets:
Enter "_©_SEGA."
Letters A, B, C, D, collected and invincibility:
Enter "SPECIAL."
Three extra lives after time reaches zero:
Enter "GP_WORLD"
All cheat features:
Enter "DOKI_PEN"

Afterburner
Continue:
During the title screen, press the pause button exactly 100 times. This will allow you infinite continues until the 18th stage. To continue, hold the D-button in the up position and hit buttons 1 and 2 simultaneously when "game over" appears on the screen.

Safe flying:
Bank your aircraft as far to the left as possible. Hold the D-pad in this position and you cannot be hit until the 12th stage.

Easy refueling:
Line up with the refueling plane when it appears. Use the D-pad to move across the top of the plane, then press Down + 1 + 2 to refuel.

Air Rescue
Test Mode:
At the title screen, press: Up, Right, Down, Left, Up, Right, Down, Left, Button 1.  You can now select your starting level, number of lives, sound test, ect.

Aladdin
Invincibility:
Enter AIQY as your password to become invincible

Alex Kidd in Miracle World
Continue game play:
Hold Up and press 2 eight times at the game over screen. Note: This code may only be enabled if there is a total of $400 or more when game play ends.

Bonus Round:
In Lake Fathom, when you come to the first octopus, kill him by punching out the tentacle segments, or you can use the Teleport powder and punch him in the face twice. After you kill him, center Alex over the gray chest and press down twice. This will bring you to an underground lake and the southernmost island in the lake.

Hint: Transform ghost into extra life:
Go to the second question mark in the first level. Punch it out and a ghost will appear. Run away from it. Go to the question mark at the end of the level. Punch it and there will no longer be a ghost where one usually appears. Instead, an extra life will appear.

Cragg Lake:
You must run over the floor in the following sequence:
SUN-WAVES-MOON-
STAR-SUN-MOON-
WAVES-FISH-STAR-FISH.

Secret Message: (Japanese Version)
When the ending message appears on the screen, press Button 1 14 times on controller 2, then press Button 1 or 2 on controller 1.

Alf
All items:
Enter the kitchen and first, collect the salami, then the cat. Move left and locate the screen that contains three doors. Enter the first door to reach the children's bedroom. Then, press Pause, hold Up + Left, and press 1 + 2.

Alien 3
Unlimited lives:
Start game play in two player mode and obtain a high score for both players. Intentionally have one of the players lose all their lives and enter ALIEN as a name on the high score screen. The corresponding player will have unlimited lives when game play continues.

Unlimited Continues:
Enter the configuration screen. Enter two players and then start the game. Complete level one with player one and let player two die three times on the fans, now complete level 2 with player one. Player two will now start again on level one but will be graced with infinite continues.
 

Alien Syndrome
Temporary invincibility:
Wait until 272, 267, 232, 222, 171, 161, 131, or 121 is displayed on the counter, then collect the boxes with the question marks from the ships.

Altered Beast
Bonus life meter:
Press Up + Left + 1 + 2 at the title screen.

Continue game play:
You can continue 4 times.  When GAME OVER appears, press:
1st continue = Up + Left + 1 + 2
2nd continue = Down + Left + 1 + 2
3rd continue = Down + Right + 1 + 2
4th continue = Up + Right + 1 + 2

Astertix
Infinite Lives:
When you reach a special treasure pot, hit it so that the bonuses fly out, collect the extra life and walk off the screen, then walk back to the chest to collect another life. Continue this until you have enough lives to complete the game.

Secret Room:
On round 1 - 1 as Obelix, go into the first well, and stand on the platform at the left of the screen. When it falls, walk left to go through a wall into the room.

Secret Room 2:
Play as Obelix in round 2-1, jump onto the rotating platforms to the Menhir container, then jump to the platform on top. Do small steps where there isn't grass and you will suddenly fall into a secret room.

Astro Warrior
Red power-ups:
Rapidly alternate buttons 1 and 2 when the words "Galaxy Zone", "Asteroid Zone", or "Nebula Zone" are displayed.  If you do it at just the right speed, the red power-up's appear.  *note* finding the precise speed to press the buttons is fairly difficult.

Argos no Ju-Jiken (Rygar)
Invincibility:
When the "SEGA MARK III" appears, hold Down + Right on Control 1 and Up + Right on Control 2 until the sword appears in the opening screen. Now, when you start the game, your character will be invincible.

Check-Point Continue:
Normally, when you use the continue option, your character appears at the start of the stage. With this code, you'll start at the Check-Point of the stage. Just select the Continue option holding Down on control 1 and 2.
 

Aztec Adventure
Level select:
Press Up five times before the Aztec Adventure scroll opens on the title screen. Press Right three times while Nino tosses money at the other characters. Press Left, Down while all characters are walking toward the left side of the screen. Nino's face will appear next to the Aztec Adventure scroll to confirm correct code entry. Use the D-pad to change the level numbers appearing below the face.

Sound test:
Start the game, and at the screen with the rainbow, press Left once, then Right twenty times. Nino's face will appear to the right of the rainbow to confirm correct code entry. Use the D-pad to change the numbers appearing above the face to select a sound, then press 1. To resume game play, select sound 00 and press 2.

Back To The Future Part 2
Level skip:
Pause the game, hold 1 + 2, and press Up, Down.

Back To The Future Part 3
Level skip:
Pause game play. Hold 1 then press Up, Down, Left, Right to advance to the next level. There are only three levels in the game.

Batman Returns
Level select:
Hold Up + 1 + 2 for approximately two seconds at the title screen. A blue screen with a level select menu will be displayed.

Black Belt
Unlimited Lives:
At the title screen, press button 1 to start the game. A red screen will appear showing the number of lives you have. When the screen goes blank, press and hold reset. Riki will walk across the top of the screen and die. After the game resets, let go of the reset button. When you start the game, you will have unlimited lives. (If this works, the background graphics in Chapter 1 will be garbled.)

Bonus level:
When the ending message screen appears after defeating Wang in the 6th level, press Up twenty times. This sends you to a secret level. (In Chapter 7, you will fight all the bosses again.)

Level Select:
At title screen, using controller 2, press:
Up, Down, Left, Right, Up+Left, Up+Right, Down+Right, Down+Left, Down, Down, Down, Down, Down, Down, Down, Up, Up+Right, Up+Right.
Then with controller 2 you can select a value using up and press a button to start the game.
Values are as following:
0 : Chapter 1
1 : Chapter 1 Boss
2 : Chapter 2
3 : Chapter 2 Boss
4 : Chapter 3
5 : Chapter 3 Boss
6 : Chapter 4
7 : Chapter 4 Boss
8 : Chapter 5
9 : Chapter 5 Boss
A : Chapter 6
(this cheat is VERY difficult to accomplish, and the diagonal directions must be pressed perfectly. For example: Up + Left must be pressed together at the exact time)

Blade Eagle 3-D
Level select:
Press Down, Left, Up, Right, Down at the title screen. A number representing the starting level will appear to the right of the word "Eagle".

Bomber Raid
Level select:
Hold Up/Left + 1 + 2 on controller two at the title screen. Then, press 1 two times on controller one.

Bonanza Brothers
Level select:
Hold Up + 1 + 2 on controller two while powering on the Master System. The opening graphics will change to confirm correct code entry. You can now choose your starting level from the options menu.

Invincibility:
Locate an area that contains a rake. Step on the rake and faint precisely at the moment that your character is hit by a bullet. Your character will be invincible until the next item is collected.

Bubble Bobble
Secret codes:
At the options screen, press Pause, and then enter one of the following cheats:

Start with 1 more life:
Right, Left, Left, Right, Up, Down, Down, Right

Start with 3 more lives:
Down, 2, 1, Right, 1, Down, 1, 2

Start with 5 more lives:
Down, Up, Up, 1, 1, 1, Up, Left

Start with shoes:
Left, Up, Left, Right, Left, Left, Down, Right

Start with shoes and blue candy:
Up, Down, Right, Down, Left, Left, Down, 2

Start with 3 candies and shoes:
Left, Left, 1, Right, Down, 1, Down, Left

Start with 3 candies, shoes, and fairy:
Right, 1, Up, Up, Up, 1, 1, 2

Start with 3 candies, shoes, fairy and 3 lives:
1, Left, Down, Up, 1, Up, 1, Up

Foods gallery:
Up, Left, Down, Left, Down, Up, Up, Left

Sound test:
2, 2, Left, 1, 2, Right, 2, Left

Level Passwords:
  48 - IEWABURN
100 - IE7CB72V
200 - 9ENVA55M

Bonus rooms and location of all secret items:
Check out this small FAQ I made.

Buggy Run
Sound Test:
Enter "SOUNDTESTAAAAAAA" as your password to access the sound test.

See the ending:
Enter "CHAMPIONAAAAAAAA" as your password. Then, start the game, and as soon as you cross the starting line, you'll see the ending.

California Games
New bike:
Enter KOTARO as a name and begin game play. Break a record, then play the bonus game. If your character wins, a new bike will be awarded.

New surfboard:
Enter NORIKO as a name and begin game play. Break a record, then play the bonus game. If your character wins, a new surfboard will be awarded.

Faster hackey-sack reflexes:
Enter TAKAKO as a name and begin game play. Break a record, then play the bonus game. If your character wins, he will be able to play the foot bag game faster.

Secret Strength:
After the Record Score screen, pictures will start to scroll across the screen. When three of the same pictures appear, press the button. Then, compete in the event indicated in the picture. See how strong you are? This trick only works with Surfing, Foot Bag, and BMX.

Captain Silver
Continue game play:
Press Up + 1 after losing all lives.

Casino Games
View dinosaur:
Repeatedly fold your hand while playing the poker game.

Super accounts:

Name: Mr. Sega, account number 9991839999.

Poker bluff:
If an opponent takes four cards and stays, call their hand and bet as much as possible. Most often, the character will fold and give your character an easy win.

Champions of Europe
Easy scoring:
Kick the ball into your own goal to score against the opposing team.

Finals:
Qualify for the semi-finals and play until a score of 0-0 is reached at half-time. Select the "Quit" option to jump to the finals.

Choplifter
Level select:
Press Up, Down, Left, Right, 1 at the first opening screen. Then, press 1 on the next screen. The phrase "Select Round" will appear to confirm correct code entry. Press Start when the desired number appears to begin game play at the corresponding level.

Rescuing level 2 hostages:
The last eight hostages on level two are in the submarine. Bomb the periscope as it appears from the water. This will cause the entire submarine to emerge. The hostages will appear on the bridge. Land next to them to start the rescue.

Stop tank from firing:
Move up and down after landing to collect the hostages to prevent the tank from firing.

When the helicopter is shot, press both buttons and move the
Directional Pad up and down.  This will enable the hostages to
eject out of the helicopter.

ON ROUNDS 1 AND 4, shoot 10 Space Mines and Superman will appear.
This will enable the hostages to run faster.

ON ROUNDS 2 AND 5, shoot the Radio Towers on the boats and Jaws
will come out of the water.

ON ROUNDS 3 AND 6, enter the caves backwards and the fireballs
can't kill you.

ON ROUND 4, for every 16 hostages you rescue, with none being
killed, E.T. will appear.

Save all hostages:
When you lose a life, repeatedly press both buttons quickly to collect all the hostages.

Comical Machine Gun Joe
Invincibility:
Pause the game and press Button 1 8 times.

Cool Spot
Cheat Menu:
Go to the option screen, highlight the music option and press Right, Right, Right, Left, Left, Left, Right, Left, Right and Left. You'll now have options including invincibility and level select.

Cyber Shinobi
Stage Select and Sound Test:
During the title screen, rotate the joystick clockwise: (Up, Right, Down, Left) 3 times,  then press Button 1.

Cyborg Hunter
Unlimited items:
Collect items, then enter and leave an elevator without traveling to another floor. The collected items will re-appear.

Dead Angle
Level select:
Hold Up on controller 1, and press Right on controller 2 to increase the starting level.  Pressing Left on controller 2 will decrease the starting level. You will hear a tone when increasing/decreasing the starting level.  Press 1 on controller 1 to start the game after selecting your starting level.

*note* pressing 1 or 2 on controller 2 at the title screen will change the difficulty setting.

Double Dragon
Unlimited continues:
Press 1 + 2 on controller one (jumping reverse kicks) at least ten times on the first screen of level four before either player moves.

Kissing Glitch:
On the Last Level, use the Infinite continue trick. In the Last Room before Jeff, Move up and Down until the enemies on the screen do the same. Continue to move up and down and make your way to the other side of the room. Be sure all enemies are off screen. Now press down and fall into the spikes, this will kill you, but with infinite continues no big deal. Keep doing it until new enemies appear and repeat till Jeff comes out Defeat Jeff on the very right side of the screen. Once defeated you make your way to your girl-friend. But... Instead it will either be an Abobo or Linda. You proceed to kiss the enemy but in a fairy-tale style the enemy turns into your girl-friend. This is a really fun Glitch.

Dynamite Duke
Cheat mode:
At the title screen, press 1 on controller two to display a hidden menu with skill level and sound test options.

Dynamite Dux
Hidden Areas:
When you have killed one of the bosses, stay at the top of the road, a road block will appear at the bottom and disappear at the top, this feature will allow you to explore normally other hidden areas.

Ecco 2: the Tides of Time
Cheat Menu:
During the game, hold 1 + 2 to display the map. At the map screen, press Left, 1 , 2, 1, 2, Down, 2, Up.  The cheat menu will appear, but the cursor will be out of alignment (but the code still works).

Enduro Racer
Level select:
Press Up, Down, Left, Right at the title screen. A number that corresponds to the starting level will appear on the top right corner to confirm correct code entry. Press Up or Down to select a level.

Super jumps:
Approach a jump at 200 kph and press Down, Up at the top of the jump. The speed of your bike will remain at 200 kph. Then, press 1 while in the air, and press 2 just before your bike hits the ground. This will allow your bike to remain in the air for a longer amount of time.

Fantasy Zone
Cheaper Ships:
Wait until the story starts to roll, then press Up and Down 25 times. Do this before the prologue ends, and start the game. You will now be able to buy as many lives as you can afford for $1000 each in the first shop you enter.

Unlimited weapon time:
Buy all the big engines (Big Wings, Jet Engine, Turbo Engine, and Rocket Engine) before buying a weapon.

More money:
Enemy bases drop bigger coins when destroyed during the first thirty seconds of the level.

Fantasy Zone 2
Clocks:
Hiyarika (Stage 3): Just below the Blackheart's warp.
Chaprun (Stage 5): Located in the middle of the "fountain" scene.
Sbadarian (Stage 7): In a hole in the "desert" scene. Highly crucial.

Red bottles:
Sarcand (Stage 2): In the "crystal" scene. That has the shop in it. Shoot at the tallest crystal.
Sbadarian: In the same scene where the Blackheart's warp is located. It's in the middle of the three loops at the bottom.

Blue bottles:
Bow Bow (Stage 4): In the "inferno" scene with the shop in it. Shoot around and you'll find the bottle.
Fuwarek (Stage 6): In the opening scene. Left of the shop. A little strategy is to buy the red bottle at the hidden shop and then get the free-bee.

Fifa International Soccer
Special Passwords:
Crazy Ball: Enter "CR*ZY" as your password.
Invisible Walls (no out of bounds): Enter "1NV1S" as your password.
No Penalties: Enter "MY0P1C" as your password.

The Flash
Cheat mode:
Wait for the title screen to appear, and quickly press Up, Right, Down, Left, Down, Right, Up.  If performed correctly, "Cheat Activated" will appear on the title screen. Then, press 1 to access the cheat mode.  This gives you a level select and makes you invincible.

The Flintstones
Level select:
Press Up, Right, Right, Down three times, Left four times at the title screen. Then, press Pause and hold 1 + 2 when game play begins. Press the D-pad in one of the following directions to begin game play at the corresponding level.
Level - Direction
      1 - Up
      2 - Right
      3 - Down
      4 - Left

Gain Ground
Cheat mode:
Hold Up + 1 + 2 and power on the Master System. A screen with extra options will appear.

Galaxy Force
Invincibility:
Press Pause 7 times at the title screen.

Gangster Town
Continue game play:
Shoot off your own hat before it disappears to continue game play.

Gauntlet
Continue game play:
Press any button on controller two after losing all lives when playing as player one. Game play will continue with player two.

Unlimited treasure room time:
Begin game play in two player mode. Allow one player to exit the treasure room. The second player will have an unlimited amount of time to collect the treasure.

George Foreman's KO Boxing
Cheat Mode:
During the Speed Select screen, hold 2 and press Left, Right, Left. A letter T will appear at the upper right corner of the screen, confirming the code. Now, during the game, pause and use one of the following commands:
Press UP = Nine super punches
Press DOWN = Recover health
Press LEFT = Finish the round
Press RIGHT = Win the match
Press 2 = The match ends in a draw

Ghost House
Freeze the Action:
At various places in the corridors, there are overhead lamps that can be touched by Mickey's head. When he jumps up and hits the lamp, it will cause all the monsters and Dracula to "freeze" for about four seconds. Since vampires can only be destroyed in human form, it is best to "freeze" the action when he is in bat form flying through the corridor. Then, maneuver close to him and begin your attack after the flashing ends.

Hidden Knives:
To gain knives, jump up and hit the candles on the walls.

Invincibility:
When you walk by a fireplace, an arrow will shoot out at you. You can duck under them, jump over them, or jump on them. Jumping on them is the best thing to do. If you jump on the arrows 25 times or so IN A ROW, you will become invincible for a short time.

Walk Through Walls:
When your next to a wall get as close to the wall as possible and turn around. (Be sure you don't walk away from the wall.) Hold DOWN on the control pad and turn back towards the wall. While still ducking, push toward the wall to go through it!

Ghostbusters
Easy $2,000,000:
Switch the last two digits of any account number.

Global Defense
Two Pads:
The game is easier if you use two Control Pads. To play with two Control Pads, press and hold right on Control Pad 2, and press Button 2 twice. Playing with two Control Pads is very difficult at first, but once you get used to it, it will boost your scores greatly.

Gokuaku Doumei Dump Matsumoto
Wrestle the aliens:
For a chance to challenge the alien champions and become the wrestling "Master of Universe"; at the game over screen after becoming World Champ, press any direction, 25 times.

Secret message:
At the title screen, press Up, Left, Right, Up, Up, Down, Right and Left on controller 2. A secret message (in japanese) will appear.

Golden Axe
Extra continue:
Hold Up + 2 at the game over screen after using the last continue.
Alternately, you can also press Up/Left + 1 at the game over screen.

Golfamania
Retake shot:
Press Reset when "In Rough" is displayed after a bad shot in stroke play or tournament mode. The game will resume with the ball at the point prior to where it left the fairway.

Golvellius: Valley Of Doom

Invincibility:
Collect all nineteen potions and herbs to become invincible after your energy reaches zero. This will remain in effect until Randar, Enni, or energy pellets are used to refill your life.

Sound Test:
Hold Up/Left + 1 + 2 while Kelesis is walking towards the cave in the opening sequence. When the old woman gives you the sword, she'll instead be a sound test.

Surprise Cheat:
Enter the password     QQQQ QQQQ QQQQ QQQQ QQQQ QQQQ QQQQ QQQK for a surprise.

HoHoshi Wo Sagashite
Sound Test:
Insert six times the word ‚Ä‚·‚Æ (Te Su To in Hiragana) as password.

Kahure's Secret Message:
Insert three times the Word ‚¨‚í‚è‚Ý‚½‚¢ (O Wa Ri Mi Ta I in Hiragana) as password.

See the Ending:
Insert three times the word ‚¢‚½‚Ý‚è‚킨 (I Ta Mi Ri Wa O in Hiragana) as password.

James Bond: The Duel
Cheat mode:
Hold Up/Left + 1 + 2 on controller two, then press 1 on controller one to display the cheat menu. Keep holding the buttons on controller 2 until the cheat screen appears.

James Pond 2: Codename Robocod
Cheat mode (C.H.E.A.T.):
When starting the game, collect the objects on the rooftop in the following order: Cake, Hammer, Earth, Apple, Tap (faucet). You will become invincible. Enter the first door and exit through the post on your left. All doors will open, and you will remain invincible.

Unlimited lives (L.I.V.E.S.):
While playing in level 1, collect the following objects in order: Lips, Ice cream, Violin, Globe, and a Snowman.

Extra Health (P.O.W.E.R.):
At the start of level 1, just past the first spike pit, collect the objects in the following order: Penguin, Oil can, Wine glass, Earth globe and Racket.

The Jungle Book
Level select:
After turning on the game, a Walt Disney logo will appear.  As the logo starts to fade out, press: Up, Down, Up, Down, Left, Right. If performed correctly, you will hear a confirmation sound. Start a new game to access the level select screen.

Jurassic Park
Sound test:
Hold the Pause button while powering on the system, and a sound test screen will appear.

Kenseiden
Continue game play:
Press Up, Up, Down, Down, 1 at the game over screen.

Level select:
Hold 1 + 2 and power on the Master System. Release the buttons when the title screen appears. Then, hold Up/Left and press 1.

Hidden Screen:
Climb the Buddha on the first round and when you are standing on its head push up to enter a secret room.

Lemmings
Level Select:
When the Lemming pulls the Sega logo across the screen, hold 1 + 2 and press Left, Right, Up, Down, Left, Right. You should hear a confirmation sound. When the title screen appears, choose your difficulty level, then go on to the New Level box and press Right (or Left) to increase (or decrease) the starting level. Now simply press Button 2 to return to the menu screen and choose the One Player box to play the selected level.

Line of Fire
3D mode:
Hold down buttons 1 and 2 while powering on your system.

Sound test:
Using controller 2, hold down buttons 1 and 2 as the title screen appears (the screen with the gun), then press 1 or 2 on controller 2 to access the sound test.  Use controller 2 to change and play the sounds.

The Lion King
Level select:
After turning on the game, a Walt Disney/Virgin screen with yellow letters will appear.  As the screen starts to disappear, quickly press: Up, Down, Left, Right, Up, Down. If performed correctly, you will hear a confirmation sound. Start a new game to access the level select screen.

Lord Of The Sword
Full health:
Locate a village and enter all the buildings twelve times. In addition to restoring your health, the villagers will reveal new information.

Marble Madness
Level select:
Select "Test FX 2" and "Test Music 5" on the options screen. The "Select Level" option may now be used to choose a new starting level.

Master Of Darkness
Level select:
Hold Up/Left + 1 + 2 at the title screen. Release the buttons when the level select screen appears.

Maze Hunter 3-D
Level select:
Hold down buttons 1 + 2 while powering on the system.  Release the buttons at the title screen, and hold Up/Left and press 1 + 2.  A number will appear in the upper right hand corner of the screen.  Use the D-pad to select a starting round, and press 1 or 2 to begin at the desired level.

Continue game play:
Hold Up/Left + 1 + 2 at the title screen to continue game play. The number of the current level will be appear in the top right corner to confirm correct code entry. Use the D-pad to select a new area and press 1 or 2 to begin game play. Note: This may only be done until level 4-4 is reached.

Bonus life:
Your character will swing the pipe immediately after it is collected. Try to hit an enemy with the swing to earn an extra life.

Mick And Mack: Global Gladiators
Level select:
Highlight the second main menu option and press Left, Right, Left, Right, Left(2), Right(2), Left, Right.

Micro Machines
Stage Select:
At the title screen, press Up, 2, Down, 2, 2, Left, 2, 2, 2.

Always finish in first place:
Start the Breakfast Bends level as usual. When the round starts, turn around and race the lap backwards. When you cross the finish line you will hear a jingle to indicate the code has worked. Whatever happens, you will now finish every race in first place.

Super Skid:
Go to the honey puddle in the center of the table on the "The Breakfast Bends" track and press 1+2. A sound will confirm the code.  This will cause your car to skid more (similar to hard mode).

Hard mode:
At the title screen, press Up, Down, Left, Right, Left, Button 2, Up to activate "Hard mode", in which your car skids more.

Rock hard mode:
At the title screen, press Up, Down, Left, Right, Left, Button 2, Up, Up, Button 2, Up to activate "Rock hard mode", which causes you car to skid a lot more.

Faster car:
On the qualifying race, get well ahead of the pack and then stop just before the finishing line, turn around, and hold button 2 to reverse over the finishing line in first place. A sound will play if you do it right, and you will have a faster car.

Easier opponents:
On the first race ("The Breakfast Bends"), drive off the top right corner of the table backwards. A sound will play if you do it right. This makes your opponents' cars slower.

Explosive Opponents:
On the first race ("The Breakfast Bends") stop your car at the top left corner of the table and press 1+2. A sound will play if you do it right. This makes your opponents explode when they touch you.

Infinite lives:
On the first race ("The Breakfast Bends"), drive off the bottom right corner of the table forwards. A sound will play if you do it right. This gives you infinite lives - although they don't show they are infinite if you lose that race.

Interesting bug:
In two-player mode, on the pool table tracks, try reversing, or being pushed by a collision, into some of the pockets. Sometimes you can get weird effects, including removing the speed limiter on your car - you just keep accelerating until the game crashes - but in one player the effect is generally bad.

Mortal Kombat
Enable blood:
Press 2, 1, 2, Down, Up at the "Code of Honor" screen.

Mortal Kombat II
Random player select:
During the Player Select screen, place the cursor on Liu Kang (Player 1) or Reptile (Player 2), hold Up and press 2.

Mortal Kombat 3
Kombat Kodes:
The Kombat Codes must be entered during the Versus Screen. Below are the icons that each number represents.

0 = Dragon
1 = MK
2 = Yin-Yang
3 = Three
4 = ?
5 = Thunder
6 = Goro
7 = Raiden
8 = Shao Khan
9 = Skull

192-234 = Enable Smoke
783-343 = Player 1 has Shao Khan
033-564 = Player 2 has Shao Khan
205-205 = Fight against Smoke
769-342 = Fight against Saibot
666-111 = Stage Select
033-000 = Player 1 with 1/2 of vitality
000-033 = Player 2 with 1/2 of vitality
707-000 = Player 1 with 1/4 of vitality
000-707 = Player 2 with 1/4 of vitality
007-000 = Player 1 with double strength
000-007 = Player 2 with double strength
466-466 = Infinite run
100-100 = Without throw
020-020 = Without Block
987-123 = Without Painel
688-422 = Dark Kombat
985-125 = Psycho Kombat

My Hero
Bonus life:
Fight the first three bull dogs, then jump over the fourth dog. Kick it from behind to collect an extra life.

Nekyuu Kousien
Secret Options:
At the Game Select menu, press Left, Right, Left, Right and Right before make your choice. A secret option screen will appear.

The Ninja
Bonus lives:
Note: A controller with an auto-fire option is recommended. Locate the round tree on the right side of the first screen of level 1. Eliminate the first Ninja that appears. Approach the tree and shoot it for approximately fifteen minutes. Complete the level with 0% to receive ten lives and a large amount of bonus points.

Bonus points:
Get a hit ratio of 100% and you will receive a massive 50, 000 points bonus.

Scroll Locations:
Scroll one is found on the first round after killing the transforming Ninja, Scroll two is found on round four, shoot the bottom of the statue five times. Scroll three is on round six, cross the last bridge on the left and walk strait to the tree above the first samurai home next to the wall. Scroll four is on round 8, Go into the top of the last garden on the right and repeat the process you used to find scroll three. The final scroll is found on stage nine, Keep to one side while reaching the top of the wall but don't kill the ninja immediately. Wait for awhile and the green scroll will appear. Collect this and you will receive instructions on how to enter the temple.

Ninja Gaiden
Infinite Ninja Magic:
Wait until you've collected 999 "N" points before using any ninja magic.

Out Run
Music Test:
At the song selection screen, press Right, Left, Down, Up, and then select a song and press 1 to hear it play.

Less Time:
After you enter the sound test code and start a song playing, press Up, Down, Left, Right, Right, Left, Down, Up, then either Left or Right + 1 to start with 75 seconds, or Down + 1 to start with 70 seconds on the timer instead of the usual 80 seconds.

Out Run 3-D
2-D Mode:
Press Pause at the title screen to choose between 2-D and 3-D mode.

Pacmania
Bonus level:
Eat all of the dots, except for the power pills in level 1. Collect the bonus item that appears in the middle of the maze to start a bonus maze.

Pit Pot
Extra Options:
In the Main Menu, put the cursor on the Beginner option and press Right, Left, Left, Left, Right, Right, Left, Right, Left.

Poseidon Wars 3-D
Continue game play:
Press Down (4), Right (3), Up (2), Left at the game over screen.

Sound test:
Press Up, Left (2), Down (3), Right (4) at the title screen

2-D Mode
press button 1 on controller 2

Power Strike / Aleste
Begin or continue the game with 10 lives:
Press Down, Right, Down, Down, Left, Right, Up, Right at the title screen.

Bonus level:
Successfully complete the game, and choose the continue option to begin at Level 00.

Sound test:
Press Up, Down, Up, Left, Left, Down, Right, Up, Button 1 or 2 at the title screen.

Disable FM sound:
This cheat can only be done if you have an FM chip (Japanese or Korean systems)
Hold Up + Left on Controller 1 and Down + Right on Controller 2 when you turn on the console.

Psychic World
Full ESP, Level select, and Sound test:
At the title screen, hold Down + 1 + 2 on controller 2, then simultaneously press Up + 1 + 2 on controller 1.

Psycho Fox
Hidden warp area:
Locate the jumping platforms at the end of level 1-3. Jump to the top of the screen. Near the top are three jumping platforms in a triangular arrangement. Jump off the lower right platform and punch the air. The sky will begin to open. Hit this same location until a black hole appears. Jump into the hole to enter the warp area. Slide down the steel ramp until two pipes appear. The first pipe leads to level 5-1 and the second pipe leads to level 4-1.

Ultimate warp:
In level 1-1, find the floating island with a lake in the middle.  Skip across the lake and jump onto the platform to the right.  Stand on the right edge of the platform and throw Birdfly.  A black hole will open.  Jump into the hole and you will be taken to the warp area.  The first pipe will take you to level 7-1, and the second pipe will take you to level 2-1.

Maps:
Click here

Quartet
Level select:
Press Pause 12 times at the title screen, then hold Up/Left on controller two, and then press either the 1 or 2 player's start button.

Sound test:
Press Pause 4 times at the title screen, then press 1 on controller two.

Larger beam:
Press Pause(14) at the title screen, then press either the 1 or 2 player's start button.

R-Type
Continue game play:
Sweep the D-pad in a clockwise Full-Circle while the countdown timer is running at the continue screen. Up to twelve continues may be added. Alternatively, enter the sound test option and play sound effect "62" three times. Begin game play and sweep the D-pad in a clockwise Full-Circle at the continue screen. Up to ninety-nine continues may be added.

Sound test:
Sweep the D-pad in a counter clockwise Full-Circle at the continue screen.

Unlimited continues:
Select sound "00" in the sound test mode. Hold 2 and press Left on controller one. The selected sound will change to "95". Press 1 and select each sound until sound "00" is selected again. After sound "00" is selected, hold 1 to resume the continue countdown. Sweep the D-pad in a clockwise in a Full-Circle to gain an unlimited number of credits.

Advanced sound test:
Hold 2 and press Right to play up to ninety-five sound effects from the game.

Invincibility:
Hold Down/Right on controller one and Up/Left + 1 on controller two and turn on the Sega Master System. Release the buttons at the title screen.

Secret Level:
In level 4, there are two openings at the top of the screen (in the area where the whole screen is filled with green cells).  Make sure you don't have the satellite on the back of your ship, then fly up into the first opening, and back your ship into the left wall.  This will take you to the secret "Super Stage"

Rainbow Islands
Level select:
At the title Screen, press Left, 2, Right, Up, Down, Left, Right, 2.  Press 2 to increase the starting level, and press 1 to start at the desired level.

Rastan
Unlimited continues:
Hold Down/Left + 1 + 2, and turn on the system. The title screen will turn blue to confirm correct code entry.

Robocop vs. Terminator
*Note* It may be necessary to re-enter the last button combo to enable the cheats.  A voice sample will confirm correct entry of the code.

Nine lives:
Pause game play and press Up + 1, Down + 1, Down + 1, Up + 2, Down + 2, Up + 2, Up + 1, Up + 1. Resume game play with nine lives.

Level skip:
Pause game play and press Down + 2, Down + 1, Up + 2, Down + 2, Down + 2, Up + 1, Down + 2, Up + 1. Resume game play to jump to the next level.

Change weapons:
Pause game play and press Up + 1, Up + 2, Up + 2, Up + 1, Down + 2, Down + 1, Down + 1, Down + 2. Resume game play, and you will have a new weapon (usually the missile launcher).

Satellite 7
Invincibility:
Pause the game and press: 1, 1, 1, 2, 2, 2, 2, 2, 2, 2.

Sega Master System (original model)
Hidden Maze Game:
To play "Snail Maze", turn on your Sega Master System without a game plugged in. At the screen that says to turn off your system and insert a game, press: Up + 1 + 2.
If your system has built in games, hold Up + 1 + 2 and power on the system.  Continue holding the buttons until the game begins.

Shanghai
Concentration mini-game:
Press Pause ten times at the title screen, then begin game play. Select the "Game" option, then select the "Start Solitaire" option. Select the "Load Stored Pattern" option, then choose the "Secret Game" pattern at the bottom of the list.

Shinobi
Level select:
Hold Down and press 1 or 2 at the title screen. Use the D-pad to select a new starting level.

Alternate level select:
At the title screen, press Down, Down, Left, Right, Up, Up, then either 1 or 2.

Sonic Chaos
Level select:
Press Up, Up, Down, Down, Right, Left, Right, Left, 1 at the title screen.

Sound test:
Press Down, Down, Up, Up, Left, Right, Left, Right, 1 at the title screen.

HA-DO-KEN:
During the Sound Test screen, do the following motion: Down, Down/Right, Right + 1 or 2 to make Sonic throw a "fire ball".

Goal Sign Tricks:
(Works in Turquoise Hill Zone, Sleeping Egg Zone and Aqua Planet Zone)

Super Ring:
Finish the round with any number of rings ending in 9 (9, 19, 29, ect.)

Continue:
Finish the round with 15, 30, 40, or 60 rings.

Backwards Sign:
Finish the round with 16, 28, 32, 44, or 58 rings.

1-UP:
Finish the round with 55, 65, 77, 88, 95, 97, or 99 rings.

Goal Sign Tricks:
(Works in Gigalopolis Zone, Mecha Green Hill Zone and Electric Egg Zone)

Super Ring:
Finish the round with a multiple of 10 rings (10, 20, 30, ect.)

Continue:
Finish the round with 00, 24, 48, or 72 rings.

Backwards Sign:
Finish the round with 18, 36, 45, 81, or 89 rings.

1-UP:
Finish the round with 11, 33, 77, 87, 94, 96, or 98 rings.

Sonic Spinball
Plethora of codes:
Enter the options menu and select the "Sound FX" option, then play one of the following sequences of sounds (the screen will then shake to confirm correct code entry)

031155 - Start with 9 lives
111250 - Weak gravity
082766 - Very weak gravity
031968 - Strong gravity
080771 - Strong inverted gravity
111141 - Scene View: Title Screen
111142 - Scene View: Veg-O-Fortress rising
111143 - Scene View: And there comes Sonic and Tails...
111144 - Scene View: Sonic, go ahead!!
111145 - Scene View: Toxic Tools Screen
111146 - Scene View: Toxic Tools Stage
111147 - Scene View: Toxic Tools Boss
111148 - Scene View: Bonus Screen
111149 - Scene View: 1st Bonus Stage
052870 - Reset to title screen
021166 - Huge Sprites
090168 - Free movement (Pause the game and press 1+2 and use the control pad to move about freely)
021566 - Stage Skip (Pause the game and press Down to skip stages)
011773 - Reset Mode (Pause the game and press 1+2)
042557 - Fast Music
022069 - Reverse colors
091254 - Reverse colors + Fast Music
042964 - 50% of speed
051370 - 25% of speed
050360 - Show year and version

Sonic The Hedgehog
Goal Sign tricks:

Super Ring:
Clear the stage with 0, 10, 20, 30 or 40 rings.

Special Stage:
Clear the stage with 50 or more rings.

1-UP:
Stage 1-1: Clear the stage with anywhere between 11 to 19 rings.
Stage 1-2: Clear the stage with anywhere between 21 to 29 rings.
Stage 2-1: Clear the stage with anywhere between 41 to 49 rings.
Stage 2-2: Clear the stage with anywhere between 11 to 19 rings.
Stage 3-1: Clear the stage with anywhere between 31 to 39 rings.
Stage 3-2: Clear the stage with anywhere between 41 to 49 rings.
Stage 4-1: Clear the stage with anywhere between 21 to 29 rings.
Stage 4-2: Clear the stage with anywhere between 31 to 39 rings.
Stage 5-1: Clear the stage with anywhere between 11 to 19 rings.
Stage 5-2: Clear the stage with anywhere between 21 to 29 rings.
Stage 6-1: Clear the stage with anywhere between 41 to 49 rings.

Sonic The Hedgehog 2
Level select:
On controller two, hold Left + 1 + 2, and turn on the Sega Master System. Release the buttons when you see Sonic chasing after Robotnik, then start the game with controller 1 to display the level select menu.

Space Harrier
Continue game play:
To continue, hold the D-button down and to the left and push button 1 when "GAME OVER" appears on the screen. This will allow 3 continues.

Additional Continues:
Press Left, Right, Left, Right, Down, Up, Down, Up at the game over screen to continue up to nine times.

Unlimited Continues:
Press Up, Up, Right, Right, Down, Down, Left, Left, Right, Right, Left, Left, Down, Down, Up, Up at the game over screen.  You can use this code as many times as you want.

Sound test:
Press Right, Left, Down, Up at the title screen.

Extra options:
Enable the "Sound test" code. Play sounds 7, 4, 3, 7, 4, 8, and 1, pressing 1 after each sound. Options to play the game as a jet, switch the vertical controls, and adjust the difficulty level will be available.

View Haya-Oh:
At the title screen, hold left on controller 2.

Secret message:
Enter ERI for your initials in all seven top scores  to view the secret message

Space Harrier 3D
2D mode:
Complete the game with a score that qualifies for a sixth or higher position on the high score screen. Enter THREE as a name on the high score screen with controller two. Note: The letters in the name will not be displayed during entry.

Level select:
Complete the game with a score that qualifies for a sixth or higher position on the high score screen. Enter LEVEL as a name on the high score screen with controller two. Note: The letters in the name will not be displayed during entry.

Sound test:
Complete the game with a score that qualifies for a sixth or higher position on the high score screen. Enter SOUND as a name on the high score screen with controller two. Note: The letters in the name will not be displayed during entry.

Continue game play:
Press Up, 2, 1, 2, 1, 1 at the game over screen.

Secret message:
Activate sound test, select sounds 7, 4, 3, 7, 4, 8 and exit. A secret message will appear.

Spider-Man
Pac-man mini-game:
Begin game play in "Nightmare" mode. At the end of the third stage, after you defeat Electro, take the key from between the conductors, and jump down while holding left so you'll land on top of the Game Gear icon. You'll be sent back to Peter's room and have the option to play the Game Gear, which starts the "Pac-Man" mini-game.

Venom's Suit:
To equip Spidey with Venom's suit, start the game in "Nightmare" mode, and after you defeat the Lizard at the end of round 2, move to the right and fall into the pit where you can find the Lizard's key. Then, walk through the sewage to the bottom of the ladder, hold Down, and press Jump to make Spider-Man dive into the sewage. Press Jump again, and Spider-Man will leap out wearing venom's suit.

Streets of Rage
Stage Select:
At the Player Select screen, press Right 20 times, then press Button 1 once for each stage you want to skip, then select your character and press Button 2 to start.

Strider
Level select:
Hold Up + 1 + 2 and power on the system.  Release the buttons when the music starts.  At the second title screen (the one after the Strider logo), press one of the following to skip to the desired level:
Level 2: Up + 1
Level 3: Down + 1
Level 4: Right + 1
Level 5: Left + 1

T2: the Arcade Game
Cheat Menu:
Go to the option screen, highlight the music option and press Right, Right, Right, Left, Left, Left, Right, Left, Right and Left. You'll now have options including unlimited credits, shield, and level select.

Teddy Boy
Extra options:
Press Up, Down, Left, Right at the title screen. "Continue", "Fire", and "1-P" options will appear.

Level select:
Enable the "Extra options" code. Press Up, Down nine times, 1 at the extra options screen. The word "Round" and a number will appear at the bottom of the screen. Press Left or Right to select a new starting level, from 1 to 50. Press 1 to begin game play at the selected level.

The Terminator
Level select:
Hold 2 and press 1 at the main title screen. Then, press Left, Left, Up, Up, Right, Right, Down, Down while the screen is black. Press Left or Right to change the "00" that appears to the desired starting level.

Thunderblade
Continue game play:
Hold Down/Right and press 2 at the game over screen.

Transbot
Bonus options:
Hold 2 when the "Sega Master System" screen appears. Release the button when a screen with the numbers one through four appears. Turn option "1" on to have ten lives available. Turn option "2" on to disable losing the arm. Turn option "3" on to disable power loss. Turn option "4" on to slow the weapon select cycling. Press 1 on controller two to exit after all options are selected.

Move underground:
Destroy the Arm Carrier and capture the Arm Capsule, which resembles a bubble marked with a question mark. Seven letters will begin to flash in order on the top of the screen. Press 1 when "D" is highlighted. Wait until Hilun flies towards your character, which resembles a blue diamond. Destroy them to allow your character to move underground.

Vigilante
Level select:
Hold Up/Left + 1 + 2 at the title screen. Use the D-pad to select a new starting level.

Wanted
Level select:
At the difficulty select screen, press Pause twice, then shoot the exclamation points in the lower right corner of the screen. Shoot one of the numbers that appear to select a new starting level.

Wimbledon
Sound Test:
Enter "SOU NDT EST" as your password to access the sound test.

Wolf Child
Secret Message:
Enter "MARIO" as your password.  This will also allow you to start on level 5.

Wonder Boy
Level select:
When the level and world numbers are displayed, press 1, 1, 2, 2, then hold down 1 + 2 . Use the D-pad to select a new starting level. Note: All dolls can not be collected when this code is enabled.

Wonder Boy In Monsterland
Forty five more gold pieces:
Press Pause 73 times to gain 45 gold pieces.  Alternately, you can press 1 or 2 on controller 2 instead of the pause button.

Answers to the Sphinx's Questions:
If the clue you got from the Barmaid was:
WHICH GAME HAVE I BEEN PLAYING? Sphinx was seasick: Afterburner. Sphinx has strange glasses: Missile Defense.
HOW DO I ALLEVIATE STRESS? In the morning, the Earth will erupt: Jogging. The Sphinx's specialty: Drinking.
WHAT DID I HAVE FOR DINNER? Yesterday our Chicken was stolen: Fried Chicken. Recently our Sphinx has been on a diet: No dinner.
MY FAVORITE HOBBY? Recently, I have heard sounds of breaking glass: Golf. So noisy at night: Karaoke.

Wonder Boy 3: The Dragon's Trap
Special password:
Enter 0PEN THE GREN D0R  as your password to start as Hawk-Man with 4 life hearts, and 1792 gold.

Super password:
Enter WE5T ONE 0000 000 as a password to start in the village with all items, ninety-nine stones, and almost one million gold pieces.

Transform anywhere:
Equip the Tasmanian sword, and jump into the air.  While in the air, simultaneously press Button 1 on pad 1 + Button 2 on pad 2.  You'll transform when you land.

Create blocks:
Equip the Magical Saber, Knight Shield, Goblin Mail, and Fire Ball. Every time you swing your sword, you'll create magical blocks.

Resurrection:
If you die wearing Hades armor you will be resurrected.

Woody Pop
Continue:
When the Game Over screen appears, press Button 1 six times.

Y's the Vanished Omens
Sound Test:
Finish the game, and at the end of the credits, wait for the message "Presented By Sega" to appear. Then, hold Down/Right and press button 1 to make the Sound Test appear.

Zaxxon 3D
Game options:
Press Pause at the title screen to access options to change between 2D and 3D modes and normal and reverse vertical controls.

Zillion
Invincibility:
When playing as JJ, go to any room that has a guard who passes in front of the computer console. Access the computer when the guard is in front of it, so that you are overlapping both the guard and the computer.  Enter the suicide code (0000), and instead of dying, you will become invincible.
NOTE: Once invincible, the pause button will do no good, which means you will not be able to change characters.

(Alternate version) To become invincible, in room (C,3), get halfway on the elevator so that J.J. is in the laser beam. Go up and down between floors. When J.J.'s power reaches 0, the floor will drop out and J.J. will be invincible. (This is difficult and may require several attempts.)

Hidden Rooms:
When you reach a dead end, shoot the wall in front of you up to 15 times to reveal a hidden room.

Extra Messages:
If you enter the suicide code in rooms D2 and G4 you will get a special message.

Zillion 2: The Tri-Formation
Continue game play:
Hold Up and press 1 at the game over screen. The word "Continue" will appear to confirm correct code entry. The game may be continued up to three times.