Enjoy one of the best announcement trailers I think I've ever seen. This is for the Steam version of BattleBlock Theater.

Buckle Your Pants! BattleBlock Theater is coming soon to Steam and new things are coming with it.

Weapon switching! Players can now switch between a primary and secondary weapon in game! New Cat Guard enemies throughout Story Mode. Steam Workshop integration for sharing user created levels. Steam Inventory integration for trading! (This allows users to trade and sell weapons, prisoners, gems and yarn via Steam.) X input, Direct Input, and Keyboard/Mouse support.

You can check out the closed beta for the game. Head on over to the beta registration page at The Behemoth. Then go check out the BattleBLock Theater website for more information.