Cities: Skylines is a city simulation game that was released a few days ago, and for those who don't know, is basically "everything Sim City should have been, and more". Despite its very recent introduction to the world, someone has already recreated the whole of GTAV's Los Santos in it.
Steam user grockefeller, who has kindly released his save game file for the city on the Steam Workshop, says:
Here's the completely built region of South San Andreas including the cities of Los Santos, Palomino, and Sandy Shores.
Ever wanted to challenge and continue the vibrant metropolis of Rockstar Games? Now you could! You'll have to deal with multiple problem like employement, ecology, waste disposal, and water gestion.
If you own the game (which is only $ 30 / £23), you can have Los Santos in it with a simple click of a button on the Steam Workshop page. Below are a few more screenshots of the city, you should recognise how incredible the work put into this is almost immediately. Also below is a video from YouTube user Smoka Cola showing the city in action.