I guess it's not interesting... Or maybe some game developers would fund such engine?
I guess it's not interesting... Or maybe some game developers would fund such engine?
Without the open world there's DarkPlaces (based on Quake), with games like Xonotic: https://en.wikipedia.org/wiki/Xonotic
Both are really good considering it's hard to make something like this tbh. Not sure if there's anything good that has all 4 of those things, though ;). People often underestimate just how much work game engines are. And also how useless they are without an actual game on them.
From what I understand there are rumours that multiplayer is something they plan to develop after their 1.0 (feature-parity with the original Morrowind engine). There are already people making patchsets that add some form of multiplayer support.