Dota 2 is a multiplayer online battle arena video game, the stand-alone sequel to the Defense of the Ancients (DotA) Warcraft III: Reign of Chaos and The Frozen Throne mod. Developed by Valve Corporation, Dota 2 was released as a free-to-play title for Microsoft Windows, OS X, and Linux in July 2013, concluding a Windows-only public beta testing phase that began in 2011.
Dota 2 is played in matches involving two teams of five players, each of which occupies a stronghold at a corner of the map. Each stronghold contains a building called the "Ancient", which the opposite team must destroy to win the match. Each player controls a character called a "Hero", and focuses on leveling up, collecting gold, acquiring items, and fighting against the other team to achieve victory.