Dota began as a user-made modification for Warcraft 3 and has grown into one of the most played online games in the world. Following in the tradition of Counter-Strike, Day of Defeat, Team Fortress, Portal, and Alien Swarm, Dota 2 is the result of Valve hiring the community developers who built the mod and giving them the chance to finally build a ...Read Morefull product out of their idea with the help of a professional team of developers and artists at Valve.