First, you will need to hit the tilde (~) key and type in
'DebugMode 1' (case sensitive). Then hit the ~ key again and press TAB. This should show you a list of the different functions available.
Hit TAB again to scroll down the list.
Cheats: (case sensitive)(X is a number)
SetCHA X - Sets your Charisma
SetSTR X - Sets your Strength
SetINT X - Sets your Intelligence
SetWIS X - Sets your Wisdom
SetCON X - Sets your Constitution
dm_givegold X - Gives the X amount of gold to you
GetLevel X - Raises you an additional X amount of levels
dm_god - Makes you invulneralble (does not require you to click on the player character)
dm_heal - Full health
GiveXP # - Give # amount of experience points