Overwatch is a team-based online multiplayer first-person shooter video game developed and published by Blizzard Entertainment. It was released in May 2016 for Windows, PlayStation 4, and Xbox One. Overwatch assigns players into two teams of six, with each player selecting one of 24 pre-defined characters, called heroes, each with unique movement, attributes, and abilities, whose roles are divided into four categories: Offense, Defense, Tank, and Support. Players on a team work together to secure and defend control points on a map or escort a payload across the map in a limited amount of time.