The singleplayer version of Hellgate: London hosts the 5 act story quest line. Elite characters can be created once a character has completed the story quest line once. The story line can be repeated in Nightmare difficulty starting with mobs starting at level 30. A character's experience is capped at 50 levels while enemies in Nightmare difficulty can reach level 62.
The last SP patch Flagship Studios released is known as version 1.2. The file is no longer officially hosted but can be found from various third parties.
NB: The original servers were shut down on February 1, 2009.[10] By July 2011 Hellgate:London multiplayer servers were relaunched using a free to play model.[11]
Hellgate: London was initially designed to be primarily focused on solo and cooperative PvE combat, but players can duel and there is a free-for-all PvP Mode for subscribers. Dueling can only take place outside of Underground hubs. Players can also choose to enter into PvP mode, which means they can be attacked and harmed outside of Underground hubs by anyone else that has chosen to enter PvP mode. That is, those in PvP mode, must always be ready for PvP. This is a way to have wide-ranging free-for-alls, or create a "friendly-fire" way of playing the game.[12] In multiplayer mode, players can meet and organize for team play and quests in safe zones - the old Underground stations, protected by the Freemasons' wards. The world will not be split in "shards" or servers, but rather play like a massively multiplayer online game with heavy instancing, such as Guild Wars. Every character is capable of soloing the entire game. Grouping with other players is optional, though grouping will bring benefits in terms of experience gain and items. As the number of players within an instance increase, the difficulty of the instance increases. The game does not feature LAN support