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