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