Star Citizen just launched its alpha 3.14 update, which adds a city in the clouds to the space sim.
The Orison landing zone is set on the Crusader gas giant, and includes a spaceport, a peace garden and other amenities befitting a sci-fi tourist destination. The trailer is below:
Crusader makes use of the initial implementation of Star Citizen's Planetary Volumetric Clouds tech. The idea is to render multi-layered, volumetric clouds of varying scale within planetary atmospheres. Developer Cloud Imperium Games said this tech will be expanded in the future to add further detail to existing planets in the game.
