Note: The following codes may only be enabled in single player mode. Press ~ to display the console, then enter iamtheone to enable cheat mode. Then, enter one of the following case-sensitive codes at the console to activate the corresponding cheat function.

Effect	Code
Add indicated number of bots	addbots [number]
Advance to indicated map	open [map name]
All weapons	loaded
Breath underwater	amphibious
Broadcast message to others	say [message]
Change game speed (default is 1.0)	slomo [1.0-10.0]
Change zoom; default is 90, sniper zoom is about 22	fov
Disable flight and no clipping	walk
First person view	behindview 0
Flight mode	fly
Full ammunition	allammo
God mode	god
Kill all indicated enemy type	killall [opponent name]
Kill all opponents	killpawns
No clipping mode	ghost
Play a previously recorded demo	playdemo [filename]
Record demo	demorec [filename]
Spawn indicated item	summon [item name]
Spawn indicated opponent	summon [opponent name]
Stop time	playersonly
Third person view	behindview 1
Toggle invisibility	invisible [0 or 1]

Note: To use cheats on a local area network, you must first click on "Create A Multiplayer Game". Select the "Server" tab. In "Admin Password" type anything (for example, 1234). In the game, press [Tab] and type adminlogin [your admin password] (in this example, 1234). You can now use codes while playing against humans. While most codes work, the following will not: playersonly, killall and other kill cheats. if you are not the server (the player that created the game), the following codes also will not work: loaded and allammo. On some computers it works, on others it will not.