Enter one of the following codes at the console menu to activate the corresponding cheat function.

Effect - Code

All spells - allammo
Breathe underwater - amphibious
Disable invisibility - invisible 0
Enable invisibility - invisible 1
Fly mode - fly
God mode - god
Kill all monsters - killpawns
Kill indicated classes - killall
Level select - switchlevel
All levels completed - completelovol
No clipping mode - ghost
Normal view - behindview 0
Select new coop level - switchcooplevel
Sends message to other players - say
Set game speed - slomo
Summon indicated class - summon
Third person view - behindview 1
Toggle time on and off - playersonly
Walk mode - walk