Note: Cheats can only be enabled in single player or cooperative multi-player mode. Press R during game play, then activate the following cheats by entering the corresponding codes:

CHEAT FUNCTION - CHEAT CODE
Enemies kill each other - 6969
Loads chopper to standard load out - loadme
Repair damage before load out - fixme
GPS Hellfire missile; remembers target - harmony
Temporary invisibility - imarat
Temporary time stop - imacow
Full ammunition - pigsoink
Kill teammate - X666