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