Blizzard filed a copyright infringement lawsuit against one of World of Warcraft's biggest private servers, but the team behind it is putting on a brave face: 'Challenges come to us often, and each time we are prepared to face them'

Turtle WoW.

If you've played an MMO for very long, you've almost certainly heard the siren song of the private server. These fan-operated servers come in all varieties—some keep dead games alive, some provide a window to a past build of an aging game, and some have even gotten the green light to keep going from the game's publisher.

Historically, Blizzard has not been so keen on this practice which, in all fairness, involves making big parts of its game playable for free. Its action against Nostalrius, a server that took World of Warcraft back to a 2006 build before that option existed officially, is one of the more notorious private server closures in history.