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