Hellgate: London is an action role-playing game developed by Flagship Studios, which was founded by Bill Roper, Max Schaefer, Erich Schaefer, and Kenneth Williams in 2003. The game was released in 2007 and is set in a post-apocalyptic London. Players take on the role of an Inquisitor, tasked with fighting against various factions and monsters in a world that has been devastated by a catastrophic event known as the "London Cataclysm".