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