ArenaNet is a video game developer and subsidiary of NCsoft, founded in 2000 by Mike O'Brien, Patrick Wyatt and Jeff Strain and located in Bellevue, Washington. They are the developers of the online role-playing game series Guild Wars.
The founders of ArenaNet were former employees of Blizzard Entertainment who played important roles in developing the highly successful video games Warcraft, StarCraft, Diablo, Diablo II, and the Battle.net gaming network. They left in February 2000 to form their own company. Their new studio was briefly called Triforge, Inc. before changing its name to ArenaNet. The company was acquired by NCsoft in 2002. On 10 September 2008, NCsoft announced the formation of NCsoft West, headquartered in Seattle, Washington. ArenaNet co-founders Jeff Strain and Patrick Wyatt left ArenaNet to take roles at NCsoft West in 2008, and ultimately left NCsoft in 2009.