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