Achievements:
Bombed & Bumped Defeat bomber & lump
Completionist Unlock all the paint powers and upgrades
Freedom Complete the game
Gone Sideway Complete the first mission
Graffiti Partner Complete a level in co-op
It's kind of a... Defeat big deal
Pacifist Complete level without killing anyone
Plinked Slink Defeat slink
Tag Collector Collect all the Tags in the game
Unkillable Complete a non-boss level without dying