To use the cheat codes, you must press the TAB key first and then enter a code. Repeat this process for every code you wish to use

Cheats
Code	Effect
allammo	Refills ammo to 999
flush	Fixes graphical glitches if they appear
fly	You can fly
ghost	You can fly, and walk through walls
walk	Restore's 'walk' mode
god	GOD mode - you can't die!
invisible1	Renders you invisible
invisible0	Renders you visible
behindview 1	Tomb Raider style camera view
behindview 0	Normal camera view
playersonly	Freezes the enemies
suicide	You commit suicide
summon dispersionpistol	Gives you the Dispersion Pistol
summon automag	Gives you the AutoMag
summon stinger	Gives you the Stinger
summon asmd	Gives you the ASMD
summon eightball	Gives you the 8-Ball Launcher
summon flakcannon	Gives you the Flak Cannon
summon razorjack	Gives you the Razor Jack
summon gesbiorifle	Gives you the GESBioRifle
summon rifle	Gives you the Assult Rifle
summon minigun	Gives you the MiniGun
summon amplifier	Gives you the Amplifier
summon dampener	Gives you the Dampener
summon flare	Gives you a flare
summon flashlight	Gives you the Flashlight
summon forcefield	Gives you the Force Field
summon invisibility	Gives you the Invisibility item
summon jumpboots	Gives you the Jump Boots
summon scubagear	Gives you the Scuba Gear
summon searchlight	Gives you the Searchlight
summon superhealth	Gives you the Super Health
summon armor	Gives you the Armor
summon enemyname	Summons enemy. For instance, summon skaarj would summon a Skaarj.
Level Skip Cheats
Code	Map
open vortex2	Vortex Rikers
open nyleve	NyLeve's Falls
open dig	Rrajigar Mine
open dug	Depths of Rrajigar
open passage	Sacred Passage
open chizra	Nali Water God Temple
open ceremony	Ceremony
open dark	Dark Arena
open harobed	Harobed Village
open terralift	Terraniux Underground
open terraniux	Terraniux
open noork	Noork's Elbow
open ruins	Temple of Vandora
open trench	Trench
open isvkran4	ISV-Kran Deck 4
open isvkran32	ISV-Kran Decks 3 and 2
open isvdeck1	ISV-Kran Deck 1
open spirevillage	Spire Village
open thesunspire	The Sunspire
open skycaves	Gateway to Na Pali
open skytown	Na Pali Haven
open skybase	Outpost
open veloraend	Velora Pass
open bluff	Bluff Eversmoking
open dasapass	Dasa Mountain Pass
open dasacellars	Cellars at Dasa Pass
open naliboat	Nali Castle Canyon
open nalic	Nali Castle
open nalilord	Nali Castle - Warlord
open dcrater	D Crater
open extremebeg	Mothership Basement
open extremelab	Mothership Lab
open extremecore	Mothership Core
open extremedgen	Illumination
open extremedark	The Darkening
open extremeend	The Source Antechamber
open queenend	The Source