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