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