Dota 2 is a multiplayer online battle arena video game and the stand-alone sequel to the Defense of the Ancients (DotA) mod. Developed by Valve Corporation, the game was released on July 9, 2013 for Microsoft Windows, utilizing a free-to-play business model. OS X and Linux versions of Dota 2 were released on July 18, 2013. Dota 2 is exclusively available through Valve's content delivery platform, Steam.
The game consists of session-based online multiplayer matches, in which two teams of five players attempt to destroy their opponents' fortified strongholds. Each player controls a "hero" character and, over the course of an individual game, focuses on improving their hero's abilities, acquiring items, and fighting against the other team.