Since release, Overwatch has been both critically and financially successful, with a player base of 35 million players as of October 2017. The game supports casual game modes as well as ranked competitive play. The game, while having several different play modes, generally features two teams of six players each, selecting pre-made heroes from the game's roster, to either attack or defend various objective points on the game's maps. Overwatch is a team-based first-person shooter developed by Blizzard Entertainment and released for Microsoft Windows, PlayStation 4, and Xbox One in May 2016.