Complete the Multiplayer game.
Collect all 47 cakes in Single Player mode.
Complete the Single Player game.
Release The Maw from his cage and send him into space.
Complete a level without killing any Scientists.
Create 5,000 filets.
Splode 300 times in a single level.
Select "Credits" from the "Help & Options" menu and watch the whole thing.
Change the controls around in the "Controls" menu.
Eliminate 10 Scientists and stop them from spreading their filthy lies.
Complete the Single Player game in Hardcore mode.
Collect all 47 cakes in Multiplayer mode.