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