Skipping levels While playing, press select. Then press L2, R2, L1, Circle, Triangle, L1, R2, L2 (NTSC version). All weapons and ammo reload While playing, press select. Then press L1, Triangle, R2, L2, L2, R2, Circle, L1 (NTSC version). All weapons and unlimited ammo Beat the game and load one of any saved game. You will than have all weapons, unlimited ammo, and new enemies.