“I made an operating system UI within Unity”

Glass is a simulated operating system user interface (UI) project and it is being made with Unity 2018.4. It is not a real OS, although everything in the package is functional and can be changed easily.

Not really an operating system, of course, but still a fascinating project. It also highlights just how versatile modern game engines really are - this is the same engine some of my favourite modern cRPGs and Cities: Skylines are running on.