Two Thumb Master
Finish the single player campaign.
30 
One Shot, Thrice The Score
Kill 3 enemies with one shot.
25 
The Things I've Seen
Shoot every type of enemy at least once.
20 
On A Gamer's Diet
Shoot 50 zombies, 50 robots, 50 pirates and 50 soldiers.
20 
Natural Born Gamer
Shoot 5000 enemies in total.
20 
Deathless Destruction
Finish a destroy the object level without killing an enemy.
15 
I'll Show You Fits Of Rage
Shoot 20 enemies in 60 seconds.
15 
You're Like Some Kind Of Robot
Get 50 longshots.
15 
Been There, Shot That
Use every power-up at least once.
15 
Nice Beating You
Defeat the first boss in the pirate theme.
10 
One Meeeeeelion Blocks!
Destroy 1,000,000 blocks.
10 
A Wilhelm Scream
Fight the final boss and fail miserably.
5