Heretic

quicken        - god mode
rambo          - all weapons
skel           - all keys
kitty          - walk through walls
ravmap         - reveals entire map
massacre       - kill all monsters on present level
cockadoodledoo - chicken mode
iddqd          - instant death
idkfa          - loss of weapons
ponce          - full health
shazam         - toggles weapon power
skel           - all keys
ticker         - FPS display
engageXX       - level warp (episode/level)
gimmeXX        - Artifacts (a-j) (1-9)
                 a=Ring
                 b=Mask of invisibility
                 c=Potion
                 d=Potion
                 e=Tome of power
                 f=Torch
                 g=Time bomb
                 h=Eggs
                 i=Golden Wings
                 j=Chaos device (warp to start of level)