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