Dota 2 is an upcoming multiplayer online battle arena video game being developed by Valve Corporation and the stand-alone sequel to the popular Defense of the Ancients mod for Warcraft III: Reign of Chaos and its expansion pack, The Frozen Throne. Formally announced on October 13, 2010 via Game Informer, the game is currently available for early test access purchase and is scheduled for a full release in 2012, with a free-to-play business model. Dota 2 will be released via download by Valve's content delivery platform Steam, on which the game has been developed to run exclusively for both release and update delivery.