8 lives in Galaxian

Note that you need a six-button controller for this cheat.

Enable the cheat menu and select ''play hidden game''. While the intro screen is running hold (X+A+Z+C) . Hold this down until the game starts. You should know the code has worked if you hear a firing sound and see no laser fire on screen. You now have 8 lives. Enjoy!

Contributed by: Shirow 

Lose in style

Plug in a second controller, but play a one-player game. When you lose, hold Down on both controllers and your opponent will kill you with a fatality or a brutality.

Contributed by: Shirow 

Play as Human Smoke

Select Smoke for a two player battle and at the VS screen, hold Back + HP + HK + Run + Block until the match starts. Smoke will explode into Human Smoke.

Contributed by: Ggultra2764 

Bonus Level

Complete the game using anybody, and make sure there's a controller in the second socket. Press Start on controller two when the green lightning appears from Shao Kahn's tower.

Contributed by: Sweet_Vengeance 

Stage Skip

Start a one-player game. Press Start on controller two after the first round ends to advance to the next opponent.

Contributed by: Sweet_Vengeance 

Cheat Mode

At the title screen that says ''Start and Options, enter B, A, down, left, A, down, C, right, up, down. You will hear a sound if entered correctly and Cheats, Secrets, and Killer Kodes will appear on the main menu.

Contributed by: Fire_Thief2 

Glitch: Stage skip

The stage skip trick can be used during the Shao Kahn match. Your square will move past the top of the match pole and you then fight endless battles against mainly Kano, Sonya, or someone else on occasion. The stage skip can continue to be used to make this go faster but eventually if you reach any E box, the game will display an error screen including something like this:

Exception $03: Address Error
Access Address: 00FF0497
Access Mode: Read, Instr
Address Space: Supervisor Program
Instruction Reg: 6001

Contributed by: Fire_Thief2 

Always defeated with fatality or brutality

Lose a single player match and hold Down on controllers one and two. Your opponent will end the match with a fatality or brutality.

Contributed by: Fire_Thief2 

Random Select

At the character select screen, Hold Up and press START.

Contributed by: Naru2005 

Kabal's Animality

Although Animalities were removed from the Genesis port of UMK3, the programers mistakenly left in Kabal's Animality and you can still use it (Sort of). Play as Kabal and when "Finish Him/Her!" appears, do Kabal's Animality (Hold High Punch, Forward, Forward, Down, Forward, Release High Punch (Close) ) Instead of Kabal performing his Animality, his head may fall off and/or the game will completely freak out and crash.

Contributed by: joshf1121 

Sound Test/Title Screen Glitch

For some reason, the game will manually and without command, highlight "EXIT" at the Sound Test screen and go back the title screen if you leave your controller alone for too long. If you happen to have music from the game playing, the song will continue to play over the main title theme.

Contributed by: XeroxClone1334 

Versus Screen Codes

Players one and two must enter these button combinations on the vs. screen with the A, B, and C buttons respectively. The number indicates the times you must press each button.

Contributed by: Undergrads2003 

Another code for Cheats, Secret and Killer Kombos

At the screen which says Start and Options

Contributed by: ratix0 

Secret in ''Killer Codes''.

At the tittle screen, open "Killer Codes"

Contributed by: BOBBAJI 

Play Forever

This code will allow you to continue playing Ultimate Mortal Kombat. The only catch is, you cannot die. When you beat the game, choose the goodie that lets you fight Ermac. Win the first round, and lose the second round on purpose. Win the third round and perform a mercy (hold Run, down,down,down, release RUN), and then perform your characters animality. You will be taken to the ''choose your destiny'' screen. Keep repeating the process, and you can rack up hundreds of wins. Note: This was fixed in version 1.2.

Contributed by: MarinerPSO 

Frosty!

When playing as either Sub-Zero (Classic or Unmasked), freeze your opponent while their health is in Danger and Dan Forden will pop out to say 'Frosty!'.

Contributed by: GeminiEntity 

Crispy!

After performing a Stage Fatality on 'Scorpion's Lair' you have two choices. You can press and hold both HP buttons to hear Dan Forden say 'Crispy!', or you can press and hold both Run buttons to hear Shao Kahn say 'Crispy!'.

Contributed by: GeminiEntity 

Ultimate EJB Menu

After the game has booted up, during the attract mode, quickly press the following sequence of buttons: P1 Block (5 times), P2 Block (10 times), P1 Block (3 times), P2 Block (1 times), P1 Block (2 times), P2 Block (2 times), P1 Block (3 times), P2 Block (3 times). If entered successfully, the Ultimate EJB Menu will appear. Note that this cheat code needs to be performed during demo/attract mode, however, the entire code must be input before the screen changes the demo image it is on.

Contributed by: belthegor 

Codes

Enter the following codes at the VS Screen.

Contributed by: jh51681, Buzda 

Play as Noob Saibot.

(Note: This code only works on the WaveNet edition of the game.)

To play as Noob Saibot, you must be playing against another human opponent. Pick Kano and, immediately before round 1 starts, hold Back + Low Punch + Low Kick + High Punch + Block. If done correctly, Kano should explode into Noob Saibot.

Contributed by: Shadow. 

Play as Human Smoke

Player One-At the Select you fighter screen, pick Smoke and press High Punch, High Kick, Block, Run, and hold away (left) with the joystick simultaneously until the match begins. Smoke will explode into the Human Smoke.

Player Two-Do the exact same thing as Player One, except press Toward (right) with the joystick.

Contributed by: Shadow. 

Crispy!

After performing a Stage Fatality on 'Scorpion's Lair' you have two choices. You can press and hold both HP buttons to hear Dan Forden say 'Crispy!', or you can press and hold both Run buttons to hear Shao Kahn say 'Crispy!'.

Contributed by: Shadow. 

Frosty!

When playing as either Sub-Zero (Classic or Unmasked), freeze your opponent while their health is in Danger and Dan Forden will pop out to say 'Frosty!'.

Contributed by: Shadow. 

Invisible Sheeva

To play as an invisible version of Sheeva, enter the 8 Man Tournament Mode by hold L and R at the main menu and press START. Then at the fighter selection screen of that mode, move the cursor to the first character of that column, hold Up and press START to initiate a random select. If you're lucky and manage to get an 'E' for your selection pick, that 'E' means your character will be an invisible version of Sheeva. Very cautious when controlling her as she could glitch the game. Invisible Sheeva also had her two fatalities from the original MK3 but you will need to enable One Button Fatality (which is the Quick Finish option) from one of the cheat menu to see it. To see her left over sprite, you must had her as the last opponent of that mode, then defeat her with a Fatality or Babality, doing so will allow you to see her classic MK3 sprite in defeated or baby form.

Note: Sheeva will not be able to perform any special moves and could crash the game so be aware of that.

Contributed by: leeko_link 

Unofficial Friendship for Ermac, Rain, and Classic Sub-Zero

To see unofficial friendship for Ermac, Rain or Classic Sub-Zero, access the Kooler Stuff cheat menu and turn on Quick Finish to enable One Button Fatality or enter this vs. kombat kode (944-944) for One Button Fatality. Upon winning, after Shao Kahn says Finish Him/Her!, stand from about 2 feet away from opponent and press the Low Kick button. The screen will darken with Ermac, Rain, or Classic Sub-Zero just holding their fist but still get credit as if they perform a Friendship finisher.

Contributed by: leeko_link 

Versus Screen Codes

Players one and two must enter these button combinations on the vs. screen with the Y, B, and A buttons respectively. The number indicates the times you must press each button.

Contributed by: Undergrads2003 

Codes

Contributed by: GeckoGamer, jh51681, tokyovigilantex, Lothar Goldfist, hand of g0d 

Crispy!

After performing a Stage Fatality on 'Scorpion's Lair' you have two choices. You can press and hold both HP buttons to hear Dan Forden say 'Crispy!', or you can press and hold both Run buttons to hear Shao Kahn say 'Crispy!'.

Contributed by: GeminiEntity 

Frosty!

When playing as either Sub-Zero (Classic or Unmasked), freeze your opponent while their health is in Danger and Dan Forden will pop out to say 'Frosty!'.

Contributed by: GeminiEntity 

Secret Gamer Pic

Win 10 Xbox Live Ranked matches to unlock a secret gamer pic which contains the number 3 with the Mortal Kombat emblem in the middle.

Contributed by: nfuse 

Codes

Enter the following codes at the VS Screen.

Contributed by: jh51681 

Achievements

Complete each of the following achievements below to get the allotted gamerscore. There are 12 achievements worth a total of 200 points.

Contributed by: Bako_Ikporamee 

Play as Human Smoke

Player One-At the Select you fighter screen, pick Smoke and press High Punch, High Kick, Block, Run, and hold away (left) with the joystick simultaneously until the match begins. Smoke will explode into the Human Smoke.

Player Two-Do the exact same thing as Player One, except press Toward (right) with the joystick.

Contributed by: Shadow. 

Unlocking Hidden Characters and Saving them

Choose arcade mode, lose a match. Then let the timer run out. You'll have 10 seconds to enter the ultimate kombat code for the character. Only 1 at a time.

Saving-
After unlocking them in arcade mode, get to the character select screen. Pause, then exit the game. you'll have them for the rest of the time your playing that time.

NOW, very important, when you start the game up the next time around, you need to FIRST go to the arcade mode. This will load the characters you unlocked. Just wait and get to the character select screen, then exit. Now you can play with the characters online.

IMPORTANT- If you do not go to the arcade mode first, you will erase the characters. Just load and exit, then play online.

Contributed by: bullsfan1512 

Play as Human Smoke

In the character select screen, press and hold down your finger on smoke. After a few seconds robotic smoke will be replaced by human smoke.

Contributed by: splotycia 

Unlock Additional Fighters

Contributed by: shankzo