Forwarding you to arstechnica.com

Does Valve really own Dota? A jury will decide | Ars Technica

Defense of the Ancient 's path from an ultra-popular Warcraft III mod to the core of Valve's ultra-popular MOBA, Dota 2 is a long and confusing saga. Now, two developers working on their own mobile versions of Dota are arguing in court that Valve didn't actually acquire a legitimate, enforceable copyright that encompasses the entirety of Dota 's development history. This question now seems set to go to a jury.