Dota 2 beta invites disappeared from Steam Inventories everywhere this morning , and now we know why. After a lengthy beta during which it became the most-played game on Steam , Dota 2 has launched and is available on Steam for free

Although beta invites have, especially recently, been abundant (and buyable) in the year and a half that Dota 2 has been playable, today marks the game's official release by Valve.

If you're planning on getting into Dota 2 for the first time, check out some of our recent coverage of the game. Get an inside look at the development of Dota 2 or read our comparison of Dota 2 and League of Legends .