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