Enter Up, Up, Right, Right, Left, Left, Down, Down; or Up, Up, Left, Left, Right, Right, Down, Down at the Purple Skeletons title screen. If done correctly, a voice will say "Excellent" and the Select Mode of Play screen will indicate "Freeplay."
Play As Human Smoke:
Select Robot Smoke and then hold Left+HP+Block+HK+Run until the match begins. For player two, use the previous code, but substitute Right for Left.
Vs Kombat Kodes:
Enter these codes in the Versus Screen in two- player mode. Use buttons A, Y, C on Controller One to enter the first 3 digits of the code and buttons A, Y, C on Controller Two to enter the second half of the code. The numbers in the code refer to how many times the button must be pushed.
390-000.....Player 1 Inflicts Half Damage
000-390.....Player 2 Inflicts Half Damage
390-390.....Both Players Inflict Half Damage
722-722.....Combo System Enabled
321-789.....Super Run Jumps
555-556.....Special Moves Are Disabled
Select Characters Randomly:
Hold Up and press Start at the Character Select Screen.
Enter the following codes at the Kombat Kodes screen that appears after a lost one-player match when that player chooses not to continue. To enter the code, hit the respective buttons (X, Y, Z, A, B, C) the number of times indicated in the code. There is a limited amount of time to enter the code, so enter one code at a time. Each time a code is entered successfully, a confirmation screen will appear and the character will be selectable at the character select screen.
Character (X, Y, Z, A, B, C)
Mileena (7, 0, 0, 7, 2, 3)
Classic Sub-Zero (7, 6, 0, 5, 2, 0)
ERMAC (9, 6, 4, 2, 4, 0)
To obtain 65, 535 kredits, first start a one player game. Let the computer defeat you through all five original kredits. Just after losing the second of the fifth match, press START on controller two. This will take you to the play mode screen. Let Shao Kahn laugh three times at this screen and you will auto matically be entered into the first option, Mortal Kombat. If you die during a match in any subsequent match, you will have 65, 535 kredits when the continue screen comes up.
Ultimate Code/Debug Menu:
At the title screen, press the following buttons: C, R Shift, A, Z, Y, C, Y, R Shift, A, X. This spells CRAZY CYRAX.
Hit Up on the main options to reveal the ? The following options should be available:
1. Free Credit
4. Classic Sub Zero
5. Fatality time
6. One round matches