Press "T" then:

SWCHAN          God Mode
SWGIMME         All Items
SWGREED         All Cheats
SWTREKxy        Warp to episode X, level Y
SWLOC           Framerate Display
SWRES           Change Resolution
SWSTARS         Restart Level
SWGHOST         No Clipping
SWMAP           Automap
SWTRIX          Bunny Rockets