Press Tab and enter one of the following codes:
God mode: eh
Infinite health: satan
All weapons and spells: addall
Infinite mana: infinitemana [0 or 1]
Extra light: becomelight [0 or 1]
Third person view: behindview [0 or 1]
Set game speed: slomo [1-5]
Enemies do not attack: invisible [0 or 1]
Increase selected spell's level: ampattspell
Flight mode: flight
Spawn donkey joke: assall
Display frame rate: showfps
Level select: start [map name]