hexen 2

I've been playing Hexen 2.

The game uses the Quake engine and...it rules. 

some cheat codes:

god: God mode

impulse 9: all weapons and mana

impulse 43: all weapons, mana, and items

notarget: ignored by enemies

give h [0-999]: give health [0-999]

impulse 40: increase level by one