You are actually describing what Darkfall is/was when i played the beta. The land is fixed but huge and basically all content is player created or dynamic. Ther

You are actually describing what Darkfall is/was when i played the beta. The land is fixed but huge and basically all content is player created or dynamic. There is nearly no mobs anywhere but if you hang around a place for some time they will spawn if you are in the areas and if you kill them all they might go extinct in that zone. It's mostly a PVP game though with big focus on players interacting and fighting over zones. I haven't played since the beta since i am sort of tired of the whole genre but it seemed cool enough to play once a while.