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