Here is the full list of all 12 Ms. Splosion Man achievements.
Complete all of the Single Player levels in Hardcore Mode.
Buy all of the unlockables.
Complete Single Player level 3-14 without touching the ground.
Collect all 47 pairs of shoes in Single Player mode.
Complete all of the Single Player levels.
Find Star Road.
Find a secret exit.
Download and play against a Ghost from a Leaderboard entry.
Destroy 10 pieces of scenery.
Complete Multiplayer level 2-14 without one of the players 'sploding.
Complete all of the Multiplayer levels.
Collect all 50 pairs of shoes in Multiplayer mode.