So the Korean Server is still up and running, free to play, while the us and europe servers have been shut down. No idea if this will be published in US or Europe.

Hellgate: London is a single player/multiplayer dark fantasy-themed action role-playing game developed by Flagship Studios and released on October 31, 2007. It was developed by a team headed by former Blizzard Entertainment employees, some of whom had overseen the creation of the Diablo series.

Set in a post-apocalyptic London in the year 2038, Hellgate: London featured both single-player and multiplayer (no longer available in europe or US) components. This allowed the player to team up with other players online to battle demons, or to fight alone in single player mode.

HellGate London (Asia)

HellGate London HD Trailer

Hanbisoft Official blog

Bring back HGL to US/Europe Petition