Level select:

Hold [Command] + [Option] and select the "Begin New Game" option.

Expert network game:

Press [Command] + M at the menu and select a network level.

Cheat mode:

Hold [Ctrl] and type one of the following codes during game play to
activate the corresponding cheat function. The sound of breaking
glass will confirm correct code entry.

Effect Code

170 degree field view vomit
All access cards axes
All grenades horse
All squad members have all weapons thrill
All weapons, ammo, and full heath aslag
Alternate field view phish
Area extraction zone ext
Berserk squad members hdcs
Enemy (green) and items (white) on map godeye
Flame-thrower tozt
Freezes opponents klatu
Full armor arm
Full health for squad members phnx
Full heath hell
Full oxygen oxy
God mode atheist
Infrared vision acid
Kill squad member 1 ksa
Kill squad member 2 ksb
Kill squad member 3 ksc
Kill squad member 4 ksd
Locations displayed on map blue
M-16 and ammo xse
Mission objectives complete qed
Mission skip soia
MP5N machine gun and ammo vent
Rocket gun and ammo deth
Squad member revolt nimrod
Squad members have full heath medic
Squad members talk chat
Super jump asd
Two pistols and ammo woo
Two shot guns and ammo freedom