Cheats For Full Version:

At the main menu type in iamcheater for version 1.0 of the game OR iwillcheat for version 1.1. You will hear a sound (clicking??) if the code is entered correcty. You may have to enter this code twice to get it to work. Now you can enter any of these codes during play. Some of these cheats only work in 1 version or the other.

Note: some codes may not work on some versions

resurrect After dying return as zombie
allitems Gett ammo and all weapons
goodhealth Full health
nohits Invincible to hits
killthemall Kill all opponents
funnyhead Big head mode
gamedone End current mission
gamefail fail current mission
openalldoor Open all doors
showtheend Show end sequence
resurrect Bring back dead companion
laracroft Different costumes Lara Croft)
enemyf show enemy from front
enemyb show enemy from back
playercoords Show coordinates in top left corner
debugdrawwire Wire frame mode
quickload Load saved game of current mission
debugdrawvolumes Unknown
fastloadgame Quick Load
cantdie You won't die
allloot Weapons and Ammo

Cheats for DEMO Version:

At the campaign select screen type in unlockcheatmode. A clicking sound means you entered the code correctly, now enter one of the following codes during game play

After death return as zombie zombie
Big heads bighead
Kill enemies killthemall
Show end sequence showtheend
End current mission OK missiondone
End current mission in defeat missionfail
Open all doors openalldoor
Get all weapons allammo
Alternate uniforms, including dressing as Lara Croft laracroft
Enemy view from the front enemylookf
Enemy view from the back enemylookb
Show coordinates in top left corner playercoords
High falls are the only thing that hurts player noplayerhits
Resistant to gunfire goodhealth