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