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