Half-Life Cheats(PS2)
Codes
Cheat menu cheats
| Effect | Code |
|---|---|
| Alien Mode | Up, Triangle, Up, Triangle, Up, Triangle, Up and Triangle |
| Bonus levels | Triangle, Square, Left, Right, Circle, X, Up, Down |
| Infinite Ammo | Down, X, Left, O, Down, X, Left, O |
| Invincibility | Left, Square, Up, Triangle, Right, Circle, Down, X |
| Invisibility | Left, Square, Right, Circle, Left, Square, Right, Circle |
| Slow motion | Right, Square, Up, Triangle, Right, Square, Up, Triangle |
| Xen gravity | Up, Triangle, Down, X, Up, Triangle, Down, X |
Passwords
Unlock all Decay missions
Go to the Options, then Cheats. To enter the code you must have two controllers.
| Effect | Password |
|---|---|
| All Decay missions unlocked including bonus mission Xen Attacks | p2_R3, p1_L3, p1_up, p1_up, p2_down, p2_down, p1_left, p1_right, p2_left, p2_right, p1_X, p1_O, START |
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