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