why do you want to know?
I honestly believe that Newgrounds brings out the vulgarity in people.... not that its a bad thing, but really it does.
At least its not 4chan
Finish level 1
Explode 100 castles pieces.
Destroy 100 barrels.
Detonate a remote bomb in flight.
Kill the king first on any level.
Destroy 10 castles with only log ammo.
Kill a Princess or a Queen first on any level.
Throw after the trebuchet has reached it's return point.
Get the 'Free' ending. According to SWFStats only 11% of population get this ending. Do you want to be that special?
Get the 'Trapped Forever' ending. According to SWFStats 60% of population get this ending.