Overwatch is an upcoming multiplayer first-person shooter in development by Blizzard Entertainment. Unveiled at BlizzCon 2014, the game emphasizes cooperative gameplay using a cast of various "heroes", each with their own abilities and roles within a team. The game entered closed beta in North America and Europe on October 27, 2015, with plans to bring the beta to Asia at a later date. The game is scheduled to be released for Microsoft Windows, PlayStation 4, and Xbox One in the first or second quarter of 2016. Unlike previous Blizzard releases, there are no plans for a version of Overwatch for OS X.