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