Here is the full list of all 30 BattleBlock Theater achievements.
Use each weapon successfully.
Successfully use every melee attack move.
Be on the winning team in 100 arena matches.
Be on the winning team in one arena match of every mode.
Collect 10 Golden Hats.
Play with the Behemoth or someone with this achievement in an online game.
Collect all the prisoners of one head shape.
Complete 10 user-created levels in a single Featured Story playlist.
Get a letter grade in every level (except Encores) in Normal Co-op Story Mode.
Get a letter grade in all eight finales in any mode.
Make a trade with someone.
Collect all the weapons in the Gift Shop by unlocking or trading.
Complete the first four finales in any mode.
Free 50 prisoners in the Gift Shop.
Get 100 kills.
Get an A++ in 10 levels.
Die enough times and we give you a prize.
Download and host a game of user-created levels.
Kill your teammate 50 times.
Get eaten alive.
Find a secret level.
Complete an encore level in Story Mode.
Get yourself a cool new weapon.
Free a fellow prisoner.
Complete the story's opening sequence in any mode.
Get a letter grade in every level (except Encores) in Normal Solo 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.
Complete all the Encores in any mode.
Free all the prisoners in the Gift Shop by unlocking or trading.