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