Overwatch is a 2016 team-based multiplayer first-person shooter game developed and published by Blizzard Entertainment. Described as a "hero shooter", Overwatch assigns players into two teams of six, with each player selecting from a large roster of characters, known as "heroes", with unique abilities. Teams work to complete map-specific objectives within a limited period of time. Blizzard has added new characters, maps, and game modes post-release, all free of charge, with the only additional cost to players being optional loot boxes to purchase cosmetic items.