X-Files: Resist or Serve Cheats (PlayStation 2)

Cheat List:

Grenade Bullets: X, CIRCLE, SQUARE, L2, RS 

Player Invincible: UP, SQUARE, CIRCLE, X, DOWN 

One Shot Kills: CIRCLE, L2, DOWN, R1, X 

Unlock All Acts: R2, RIGHT, L2, UP, SQUARE 

Unlock All Bonus Features: LEFT, R1, L1, DOWN, CIRCLE 

Cheat: Infinite Ammo:

In the cheats section enter L1, L2, X, R2, R1 

Cheat: Infinite Health Packs:

At the optical disk, instead of entering Mulder's code enter Chris Barnes' code to receive
a free health pack. You can repeatedly enter Barnes' code for more health packs, but only
until you enter Mulder's code.