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