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