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.

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