The SpatialOS platform, which provides cloud services to a number of online worlds like Worlds Adrift and Fractured, is branching out once again. A new SpatialOS Unity dev kit has been introduced, allowing game developers the ability to make their own large scale online titles with the Unity engine.
https://gdk.improbable.io/spatialos-gdk-unity
https://gdk.improbable.io/spatialos-gdk-unity