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