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