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