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