Defense of the Ancients is soon to become Legal Defense of the Ancients, as two major game development firms go head to head in the courtroom.

Valve and Blizzard are now at war over the use of the Defense of the Ancients (DOTA) name, as both plan to use it for a new title.

You may or may not remember that DOTA was a hugely popular fan-created modification, using the free world editor included in Warcraft III. It went on to become an important tournament scenario, starting at BlizzCon convention in 2005.

This means that while it was not technically created by Blizzard, the first game and the name that went with it was created using Blizzard tools, within a Blizzard game.

Yet Valve has since hired one of the creators of the modification, known as IceFrog, and has announced it is working on DOTA 2. As part of the development, Valve submitted an application to trademark the name.

Blizzard is not happy about this, claiming that the DOTA name is synonymous with the world it created in Warcraft III.

The company says that allowing Valve to use the name would damage its business, and impact the "legions of blizzard fans", by making them believe that DOTA 2 is in some way connected to Warcraft.

It said in a statement: "By attempting to register the mark DOTA, Valve seeks to appropriate the more than seven years of goodwill that Blizzard has developed in the mark DOTA and in its Warcraft III computer game and take for itself a name that has come to signify the product of years of time and energy expended by Blizzard and by fans of Warcraft III.

"Valve has no right to the registration it seeks."ADNFCR-1220-ID-801290254-ADNFCR
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