Press TILDE to drop the developer console. You need to enter sissy to enable cheat mode.

God mode .... alamode
All weapons .... packnheat
Extra ammo .... payload
All weapons/god mode .... iamsolame
Extra doughnuts .... piggytreats
Extra money .... jewsforjesus
Extra dog treats .... boyandhisdog
Extra catnip .... iamtheone
Extra cats .... lotsapussy
Extra health pipes .... jones
All radar items .... swimwithfishes
Rocket camera .... fireinyourhole
Body armor .... blockmyass
Gimp suit .... smackdatass
Police uniform .... iamthelaw
Full health/medkits .... healthful
Clipping .... ifeelfree
Flight mode .... likeabirdy