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