While playing, press t to enable multiplayer chat, then type the
cheat and hit ENTER.

Cheat code: Effect:
mpkfa All weapons, full health, full energy.
mptears Repeat effect of above cheat.
mphealth Restores full health.
mpammo Full energy
mparmor full armor
mpmaphole Level Skip
mpgod God Mode
mppos Show position
mpguns All guns
mprosebud Spawns a tiny silver briefcase (its from NOLF)
mpnextmission AXskips the entire mission