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 "<cheat>" and the remaining portion of each code.
| Result | Cheat Code |
| Toggle invincibility | <cheat> mpcanthurtme |
| All weapons and ammo | <cheat> mpschuckit |
| Infinite ammunition | <cheat> mpbunker |
| Full armor | <cheat> mpsmithy |
| Full ammunition | <cheat> mpkohler |
| Full ammunition | <cheat> mpstockpile |
| Set health to indicated number | <cheat> mpdoctordoctor [number] |
| Teleport to level start with default conditions | <cheat> mpbeamme |
| Toggle no clipping | <cheat> mpsixthsense |
| Toggle third person view | <cheat> mpicu |
| Toggle speed display | <cheat> mptachometer |
| Toggle size display | <cheat> mpsizeme |
| Toggle rotation display | <cheat> mpgrs |
| Show position info on/off | <cheat> mpgps |
| Use keys to edit FOV value | <cheat> mpfov |
| Use keys to edit vertext tint | <cheat> mpvertextint |
| Use keys to edit light amplification | <cheat> mplightadd |
| Use keys to edit light scale | <cheat> mplightscale |
| Use keys to edit weapon breach | <cheat> mpbreach |
| Use keys to edit weapon offset 1 | <cheat> mpwmpos |
| Use keys to edit weapon offset 2 | <cheat> mpwpos |
| Marines have slurred voice | <cheat> mpmillertime |
| Change into indicated character type | <cheat> mpmorph [character type] |
| Level select for all three species | <cheat> mpxfiles |
| Unknown | <cheat> mpreloadbutes |
| Unknown | <cheat> mptriggers |
| Unknown | <cheat> mpmph |
| Unknown | <cheat> mpconfig |
| Unknown | <cheat> mpdeathtoall |
-From: blizzard247x@yahoo.ca, racerx2999@hotmail.com, and thebigone187@hotmail.com
Use one of the following values with the "<cheat> mpmorph [character type]" code: