Pause game play in Adventure mode then press Up(2), Down(2), Left, Right, Left, Right, B, A. to display the cheat code entry screen. Then, enter one of the following codes to activate the corresponding cheat function. Note: Some codes will disable achievements from being earned and the game from progressing.

Invincibility
Enter TimSweeneyHealth13 as a code.

Arrows reveal weapon parts
Enter WeaponPartTesting as a code.

Increased vehicle firepower
Enter AndyGomez as a code.

Unlimited chainsaw
Enter CliffyBFTW as a code.

Unlimited secondary items
Enter stevebrooks as a code.

Unlimited specialty melee attack
Enter JenniferSweeney as a code.

Blurry screen
Enter Spielberg as a code.

Disable special tracking cameras
Enter ihatefunkycameras as a code.

Empty shells stay in the air
Enter GearsFTW as a code.

Faster music
Enter upthejoltcola as a code.

First person view
Enter MorgyTheMole as a code. Note: Press Y to return to third person view, but without a head.

Jennifer's chest is bigger
Enter ArieannDeFazioWithFlair as a code.

Monsters explode upon death
Enter Willy as a code.

Monsters have more health
Enter Legendary as a code.

No monsters
Enter UnrealEngine3 as a code.

Push objects away from player
Enter SouthPeak as a code.

Slow motion
Enter ZombiesHaveEatenMyNeighbors as a code.

Slow motion when hitting monster
Enter StreetFighter as a code.

Slower framerate
Enter GimmeFramerate as a code.

Low pitched voices
Enter TalkDirtyToMe as a code.

Animal sounds
Enter patrickdugan as a code.

Higher pitched voices
Enter chipmunks as a code.

Very fast movement and weapon fire
Enter MonsterHunter as a code.

Super jumps
Enter Armstrong as a code.

Mirror mode
Enter MirrorMirror as a code.

White graphics
Enter TokenInverse as a code.

Blue and orange graphics
Enter TitleTown as a code.

Red graphics
Enter NotQuiteTitleTown as a code.

Remove film grain
Enter reverb as a code.

Upside down screen
Enter TopsyTurvy as a code.