Enter Square, X, Circle, Triangle, Triangle, X, Square, Circle, Triangle, Circle, X, Square as a password three times. Note: Ignore the invalid password response between entries. Select the blank position at the bottom of the "Movies" menu to view all FMV sequences in the game.
At the "Press Start" screen, press Triangle, X, Square, Triangle, Circle, X, Square, Circle, Square, Triangle, X, Circle. Then, the game will begin without sound effects. Exit the game, enter options, then turn sound effects "On" and re-enter the code.
Begin a game on the Human Prey or Hunter levels. Then, hold L1 + Up, and press X + Square. Now your character may move freely through out the level and have a rapid fire weapon. Note: Your character will also be invincible while shooting the weapon.
Enter one of the following passwords to view artwork and additional scenes for the corresponding game character.
| Gallery | Password |
| Compy | X, Triangle, Triangle, Square, X, Circle, Triangle, Square, Triangle, Circle, X, Circle |
| General | Square, Circle, Square, Circle, Circle, Circle, Square, Circle, Square, Circle, Square, Circle |
| Human Prey | Triangle, Square, Circle, Square, X, Triangle, Triangle, Circle, X, Square, Triangle, Triangle |
| Hunter | Triangle, X, Square, Triangle, Circle, X, Square, Circle, Triangle, Square, X, Circle |
| Sarah | Circle, Circle, X, X, Triangle, X, Triangle, Square, X, X, Triangle, Triangle |
| T. Rex | Triangle, Triangle, Circle, Square, Triangle, X, Triangle, Square, Square, X, Triangle, Circle |
| Velociraptor | Circle, Square, Triangle, X, Circle, Triangle, Square, X, Circle, Square, X, Triangle |
Enter one of the following passwords to begin at the corresponding level with 99 lives.
| Level | Password |
| Compy | X, X, Circle, Triangle, Square, X, Square, X, Circle, Square, Triangle, Square |
| Human Hunter | Square, Square, Triangle, Circle, X, Square, Square, Square, Square, X, Circle, Triangle |
| Velociraptor | X, X, Circle, Triangle, Square, X, Square, X, Square, Square, Triangle, Circle |
| T. Rex | X, X, Circle, Triangle, Square, Square, Square, X, Triangle, Square, Triangle, Square |
| Human Prey | Square, Square, Triangle, Circle, X, X, Square, Square, Triangle, X, Circle, Triangle |
| Infinite Energy (First Compy Level) | 800B3A7E 0064 |
| Infinite Lives | 80050CAA 0701 |
| Infinite Lives (BPC) | 80015FE4 0000 80015FE6 0000 |