Guild Wars 2

The title speaks for itself

it doesn’t could you please explain more

It’s a DAoC reference :P
It was a big persistent PvEvP dungeon, opened by frontiers’ conquests.
When the dungeon switched realm, there was some nice fight between the new owners and the old owners who were still inside.

I know, it would be quite a design and implementation challenge for GW2… but it was awesome :P