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