Valve has released the first official trailer for their long awaited squeal to Defense of the Ancients (DotA2), at this years Gamescom. Check it out below.

Dota 2 is an upcoming action fantasy strategy video game being developed by Valve Corporation. It is the stand-alone sequel to the popular Warcraft III custom map Defense of the Ancients. The title was formally announced on October 13, 2010 via the Game Informer website. The game currently is scheduled for release in 2011, which would make it Valve’s second release of the year, following Portal 2. The game’s lead designer is the longest-serving and current developer of Defense of the Ancients, known as “IceFrog”, who continues to maintain his public anonymity, while leading a development team at Valve. The game will be released through both retail and Steam, for Microsoft Windows and Mac OS X.[1] Dota 2 marks Valve’s first fantasy, as well as Action RTS game.