Terminator 3: Rise of the Machines Cheats

To unlock, go to Level 7 - Hollywood. Once you destroy the refuelling station head left into the room, where there is an arcade machine. Press X in front of it to play and unlock Missile Command. You can now play this in the Special Features.

Enter HKSGP as a password then pause the game during play and enter these codes:
Code - Effect:

JGSGF - Ending
NRBGB - Level 2
RWHGK - Level 3
NGGGC - Level 4
BMFGT - Level 5
LRHGF - Level 6
NRPGD - Level 7
RLPGJ - Level 8
LWRGH - Level 9