Completion bonuses:-  Successfully complete the game under the easy difficulty setting to unlock the special menu and movie mode.

Shoot credits:-  You can use your gun to shoot the ending credits.

Successfully complete the game under the normal difficulty setting to unlock two player mode. In this mode, one person moves using a Dual Shock 2 controller, while the other shoots with a GunCon2.

Successfully complete the game under the normal difficulty setting with a rank "B" or greater without using any Resurrection Packs to unlock
infinity mode.

Complete the game on Normal without using a resurection pack and get at least an overall B grade at the end of the game.

Successfully complete the game under the hard difficulty setting to unlock the game art.

Gameshark Codes

(M) Must Be On 0E3C7DF21853E59E  EE8EFDFEBCD0A302
Max Points DEAFDF3ABC413102
Inf Health CEAFDF94BCA9DB23
Max Recovery Aid CEAFDE76BCA99CE6
Max Resuscitation CEAFDE72BCA99CE6
Max Antidotes CEAFDE7EBCA99CE6
Have Ampoule CEAFDE06BCA99C84
Max Tachyons CEAFDE02BCA9C292