The Behemoth's long-awaited follow-up to Castle Crashers was BattleBlock Theater--a game that our review says "may have bitten off more than it can comfortably chew." Still, the ambitious platformer is large enough that players can "enjoy its likable, zany sensibilities throughout." After a beta test on PC two months ago, the studio has announced the Steam version will be available to purchase on May 15th.
New to the PC and Linux version is weapon switching, allowing players to switch between a primary and secondary weapon. New Cat Guard enemies have also been added throughout Story Mode. Finally, Steam Workshop will allow players to share user-created levels, trade and sell weapons, and more. It'll be $15--but free to anyone that participated in the beta.
To re-familiarize yourself, here's the PC trailer: