Complete all the Encores in any mode.
Get a letter grade in all eight finales in any mode.
Get a letter grade in every level (except Encores) in Normal Solo Story Mode.
Collect 10 Golden Hats.
Use each weapon successfully.
Collect all the prisoners of one head shape.
Complete the first four finales in any mode.
Die enough times and we give you a prize.
Free 50 prisoners in the Gift Shop.
Collect all the weapons in the Gift Shop by unlocking or trading.
Get eaten alive.
Get an A++ in 10 levels.
Play and rate 10 user-created levels.
Get yourself a cool new weapon.
Download and host a game of user-created levels.
Trade online with ten different players.
Successfully use every melee attack move.
Make a trade with someone.
Play with the Behemoth or someone with this achievement in an online game.
Find a secret level.
Free a fellow prisoner.
Complete the story's opening sequence in any mode.
Be on the winning team in 100 arena matches.
Be on the winning team in one arena match of every mode.
Free all the prisoners in the Gift Shop by unlocking or trading.
Kill your teammate 50 times.
Get 100 kills.
Get a letter grade in every level (except Encores) in Normal Co-op Story Mode.
Get a letter grade in every level (except Encores) in insane solo story mode.
Get a letter grade in every level (except Encores) in insane co-op story mode.
