itsawonderful          Extra life
onandonandon           Maximum number of game continues
threemileisland        Maximum energy
iddqd                  Show developers
idkfa                  Show testers
popquizhotshot         Gives you 1000 bullets
hatman                 Stick figure mode
bloated                Jim gets an afro
festering              Jim gets a red afro
sweaty                 Jim gets big lips
pusfilled              Jim gets antenae
malformed              Jim gets a big pair of glasses
slugforabutt           Jim gets an arrow through the head 
slaughterhouse         Access the first five levels of the game
getthecheesetosickbay  Access all levels
apollo13               Gives you 9 rockets  

What the Heck          Kettle, Faucet, Cow, Faucet, Cow, Faucet 
Down the Tubes         Paint, Faucet, TV, Faucet, Cone, TV 
Pod races              Cone, Kettle, Cone, Cow, Cow, Kettle 
Snot a Problem         Cow, Kettle, TV, Cow, Kettle, Paint
Level 5                TV, TV, Cow, Can, Cow, Hammer 
Darkness               Kettle, Paint, Can, Faucet, Paint, Faucet 
Peter Puppy            Cow, TV, Kettle, Cow, Kettle, Paint 
Buttville              Can, TV, TV, Kettle, Cone, Cow 
Andy Asteroids         Cone, Faucet, Cow, Cow, Cow, TV 

Thanks to Revolution readers Luke W Campbell, John Case III, Joe, Jon-Jo-Julie, winfield, Muhammad Heizy Jonet, and The Bunny!!