Hellgate: London

Hellgate: London came out in 2007 from Flagship Studios, a team made up of former Blizzard people who had worked on Diablo. The pitch was basically Diablo in first person, set in a post-apocalyptic London overrun by demons, with both single-player and a subscription-based MMO mode. The game had some genuinely cool ideas, randomized dungeons, real loot, decent combat, but it shipped buggy and unfinished and the studio ran out of money fast. Flagship folded in 2008, the original servers went dark in 2009, and the IP got passed around between different Korean publishers who tried to revive it with mixed results. Theres still a fan project called London 2038 that brings back the original game with bug fixes and new content, which is honestly the best way to play it now.