Cheats & Hints
Half-Life Cheats & Codes
Cheat menu cheats
| Code: | Description: |
|---|---|
| Up, Triangle, Up, Triangle, Up, Triangle, Up and Triangle | Alien Mode |
| Up, Triangle, Down, X, Up, Triangle, Down, X | Xen gravity |
| Right, Square, Up, Triangle, Right, Square, Up, Triangle | Slow motion |
| Left, Square, Right, Circle, Left, Square, Right, Circle | Invisibility |
| Left, Square, Up, Triangle, Right, Circle, Down, X | Invincibility |
| Down, X, Left, O, Down, X, Left, O | Infinite Ammo |
| Triangle, Square, Left, Right, Circle, X, Up, Down | Bonus levels |
| 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 | All Decay missions unlocked including bonus mission Xen Attacks |
Half-Life Hints, Tips
- Invincibility
- At the cheat menu, press Left, Square, Up, Triangle, Right, Circle, Down, X.
- Infinite ammunition
- At the cheat menu, press Down, X, Left, Circle, Down, X, Left, Circle.
- Invisibility
- At the cheat menu, press Left, Square, Right, Circle, Left, Square, Right, Circle.
- Slow-motion mode
- At the cheat menu, press Right, Square, Up, Triangle, Right, Square, Up, Triangle.
- Alien mode
- At the cheat menu, press Up, Triangle, Up, Triangle, Up, Triangle, Up, Triangle.
- Xen gravity
- At the cheat menu, press Up, Triangle, Down, X, Up, Triangle, Down, X.
