Project: Overkill cheats and cheat codes for Playstation

God mode
Pause the game play, highlight the "sound Volume" option. Then, hold
Right and press O, Square, Triangle. Hold Left and press O, Square,
and X. The "Cheater" message will confirm the correct code entry.

Shield
Pause the game play, highlight the "sound Volume" option. Then, hold
Right, and press O, Square, Triangle. Release Right, hold Left and
press Square, O, X. Now release Left and resume the game to have a shield.
The "Cheater" message will confirm the correct code entry.

Turbo
Pause the game play, highlight the "sound Volume" option. Then, hold
Up and press Triangle(3 times). Release Up, hold Down and press X, Square,
O. Release Down. The "Cheater" message will confirm the correct code entry.

Predator
Pause the game play, highlight the "sound Volume" option. Then, hold
Triangle and press Square, X, X Square. Release Triangle, hold X, and
press Triangle, Triangle. The "Cheater" message will confirm the
correct code entry.

End current level
Pause the game play, highlight the "sound Volume" option. Then, hold
X, Up, Down, Up. Hold Square and press O. Release Square, hold
X, and press Triangle. Release X. The "Cheater" message will confirm
the correct code entry.

Body slide
Pause the game play, highlight the "sound Volume" option. Then,
press Up, Down, Down, Up. Hold Square and press O. Press Triangle,
X (or X, Triangle). The "Cheater" message will confirm the correct
code entry.

Hidden level
In the Throg Breeding Facility, there is a secret entrance to the
Lost city. It is located in the lower right corner of the map. Break
through three or four secret doors to find the exit. The Lost City is
full of insect-monster larvae and the Throg-Viscerian genetic brain
mutations.

Test mode
Pause the game play, highlight the "sound Volume" option. Then,
press Left, Right, Right, Left. Hold X and press Triangle. Hold Triangle
and press X. The "Cheater" message will confirm the correct code entry.

Cloaking device
Pause the game play, highlight the "sound Volume" option. Then, hold
Triangle and press Square, O, O, Square. Release Triangle, hold
X and press Triangle, Triangle. Release X. The "Cheater" message will
confirm the correct code entry.

Restore health
Pause the game play, highlight the "sound Volume" option. Then, hold
Square and press O, X, Triangle. Release Square, hold O, and press
Square, X, Triangle. Release O. The "Cheater" message will confirm
the correct code entry.

Restore ammunition
Pause the game play, highlight the "sound Volume" option. Then, hold
O and press Square. Release O, hold Triangle, and press X. Release
Triangle, hold O, and press X. Release O, hold X, press Square.
Release X. The "Cheater" message will confirm the correct code entry.