While playing a game, press [Enter], type one of the following codes, then press [Enter] again to activate the corresponding cheat function. If you entered the code correctly, you will hear the sound of the predators mask switching vision types. Note: There is a space between "" and the remaining portion of each code.
Result
Cheat Code
Toggle invincibility mpcanthurtme
All weapons and ammo mpschuckit
Infinite ammunition mpbunker
Full armor mpsmithy
Full ammunition mpkohler
Full ammunition mpstockpile
Set health to indicated number mpdoctordoctor [number]
Teleport to level start with defaultconditions mpbeamme
Toggle no clipping mpsixthsense
Toggle third person view mpicu
Toggle speed display mptachometer
Toggle size display mpsizeme
Toggle rotation display mpgrs
Show position info on/off mpgps
Use keys to edit FOV value mpfov
Use keys to edit vertext tint mpvertextint
Use keys to edit light amplification mplightadd
Use keys to edit light scale mplightscale
Use keys to edit weapon breach mpbreach
Use keys to edit weapon offset 1 mpwmpos
Use keys to edit weapon offset 2 mpwpos
Marines have slurred voice mpmillertime
Change into indicated character type mpmorph [character type]
Level select for all three species mpxfiles
Unknown mpreloadbutes
Unknown mptriggers
Unknown mpmph
Unknown mpconfig
Unknown mpdeathtoall