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