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