Hidden Options Screen:
When a 'story' screen appears, press X, L1, L2. Press Start to go to the Kombat Kube screen, then press Up to reveal a question mark. From this screen you can select many hidden game options.

Options Codes:
At the trademark screen, press Square, X, Circle, Triangle, R1, R1, R2, R2, R1, R1. Shao Kahn will say, "You will never win." Press Up when you see spinning MK3 logo cube.. A question mark appears. From here you can select from a number of options including playing as Smoke and unlimited credits.

Kombat Codes:
Enter any of the following in 2-player vs. mode -

Combos Disable:
Rayden, Ying-Yang, Ying Yang, Rayden, Ying-Yang.

Ying Yang Super Run Jumps:
3, Ying-Yang, MK, Rayden, Shao Kahn, Skull.

Special Moves Disabled
Lightning bolt, lightning bolt, lightning bolt, lightning bolt, lightning bolt, Goro.

Player 1 Does Half Damage:
3, Skull, Dragon Symbol, Dragon Symbol, Dragon Symbol, Dragon Symbol.

Player 2 Does Half Damage:
Dragon Symbol, Dragon Symbol, Dragon Symbol, 3, Skull, Dragon Symbol.

Both Do Half Damage:
3, Skull, Dragon Symbol, 3, Skull, Dragon Symbol.

Power Regains:
Skull, Rayden, Lightning bolt, 3, MK, Dragon Symbol.

Super Endurance:
Dragon Symbol, Ying-Yang, ?, Goro, Shao Kahn, Skull.

Real Kombat:
Dragon Symbol, ?, Dragon Symbol, ?, Dragon Symbol, ?

Ultimate Kombat Code (Play As Smoke):
When the MK3 Copyright screen appears, hold R1 and press Right, Down, Left, Up, Right, Down, Left, Up on controller 1. Now press R1, Triangle, Triangle, Triangle, Triangle, Triangle, Triangle, Circle, Circle, Circle, Circle, Circle, Circle, Circle, Circle, Circle, X, X, X, X, X, X. You can now select Smoke.

Unlimited Continues:
During story mode, press Up, Up, Right, Right, Left, Left, Down, Down.

Play As Smoke:
Enter the Kombat Kode 010-696 at the Kombat Kode screen.