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