i have cheats and hints for this game. If the cheat dont work then keep trying till you hear a noise.
play as Scorpion
At the main menu, hold L2 then press Square, Up, L1, R1, Left, Right, Square to unlock Scorpion in Versus mode. If you entered the code correctly, you will hear a sound. Alternately, successfully complete the game with Liu Kang to unlock Scorpion in Single Player and Co-Op mode. To unlock Scorpion in Versus mode, in the Foundry area, follow the pathway downstairs to the left of the save point. Two archers will break through the wall. Throw one at the wall to the left of the doorway to break it open, giving you access to a hidden room full of lava and a Ying Yang on a ledge. Grab one of the archers and throw him into the lava. Then, double jump off his back to get the Ying Yang that unlocks Scorpion in Versus mode.
Play as Sub-Zero
At the main menu, hold L2 then press Square, Down, Up, L1(2), Up, Square to unlock Sub-Zero in Versus mode. If you entered the code correctly, you will hear a sound. Alternately, successfully complete the game with Kung Lao to unlock Sub-Zero in Single Player and Co-Op mode. To unlock Sub-Zero in Versus mode, take the boat ride across blood lake. You can find Sub-Zero's Versus mode icon in back of the lion-like statue to your left (when facing the big door). Run along the wall and double jump at the end to collect it.
mortal Kombat 2 arcade game
At the main menu, hold L2 and press Square, Up, Down, Right, Left, R2, Square to unlock the classic Mortal Kombat 2 arcade game in the Kontent menu. If you entered the code correctly, you will hear a sound. Alternately, successfully complete all five Smoke missions. Note: This feature is not available in the European version of the game
NOTE: If you do the code correctly you can play in story and VS for sub zero and scorpion.
[Edited by Talksick, 10/22/2005 11:32:01 AM]