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