Mike O'Brien served as the president of ArenaNet and was one of the three founders of the company, along with Jeff Strain and Patrick Wyatt. He led the design and content teams for Guild Wars, and acted as the executive producer of Guild Wars 2. Mike O'Brien left ArenaNet on October 10, 2019.
Prior to founding ArenaNet, Mike O'Brien worked at Blizzard Entertainment for more than four years. He was the original creator and programmer of Battle.net, wrote the networking code for Diablo and Starcraft, and started the Warcraft III project as the team lead and lead programmer, personally writing the game's 3D rendering engine.
Mike was featured as one of the 25 most influential people in the game industry in PC Gamer's September 1999 cover story, "Game Gods".
|The Guild Wars 2 Wiki has an article on Mike O'Brien.