Hellgate: London is a computer game developed by Flagship Studios. The design of the game is similar in a number of ways to the Diablo series. This is due to influence of Flagship Studios co-founders including a number of ex-Blizzard North employees, including Diablo series creators Erich Schaefer and former President David Brevik. The other founders are Erich's brother Max Schaefer, former Blizzard North Vice President Bill Roper, and Diablo II producer Kenneth Williams.