eldavojohn writes "I have a slightly older friend who played through the glory days of Ultima Online. Yes, their servers are still up and running, but he often waxes nostalgic about certain gameplay functions of UO that he misses. I must say that these aspects make me smile and wonder what it would be like to play in such a world — things like housing, thieving and looting that you don't see in the most popular massively multiplayer online games like World of Warcraft. So, I've followed him through a few games, including Darkfall and now Mortal Online. And these (seemingly European developed) games are constantly fading into obscurity and never catching hold. We constantly move from one to the next. Does anyone know of a popular three-dimensional game that has UO-like rules and gameplay? Perhaps one that UO players gravitated to after leaving UO? If you think that the very things that have been removed (housing and thieving would be two good topics) caused WoW to become the most popular MMO, why is that? Do UO rules not translate well to a true 3D environment? Are people incapable of planning for corpse looting? Are players really that inept that developers don't want to leave us in control of risk analysis? I'm familiar with the Bartle Test but if anyone could point me to more resources as to why Killer-oriented games have faded out of popularity, I'd be interested."