"Fallout Online" is what I'm most afraid of
There was custom engine made out that port over Fallout 1-2 World over that was used to make a Fallout MMO. Most of the player base consisted of roving bands of raiders from eastern that clashed for control of the cities and Self Delete bombers that would attack the NCR capital. You could start your own faction, travel all of the FO-1 and 2 locations along the west coast and go to new reno. You could craft items, mine resources to make them, you take npcs as slaves, have npc armies. It was interesting, he players gave the world that lawless feeling since you had thiefs pick pocketing players, the warbands, and the Self Delete bombers.