Here is the full list of all 12 SpongeBob SquarePants Underpants Slam! achievements worth 200 gamerscore.
Collect all the Gold Medals
Use Super Moves 25 times!
Fall out of the level 50 times
Be ‘it’ for 50 seconds!
Collect 1000 underpants!
Defeat 100 Jellyfish!
Win a multiplayer game
Complete a Quest Mode game
No pants in a multiplayer game!
Break out of a Stun!
Complete all Time Trial levels
Beat Quest mode with all 5 characters