I really liked this sim and wanted to visit it again, but apparently I didn't bookmark it or anything, and I can't remember what it was called. I do have some screenshots I took of it though.
It was dark and foggy. You teleported in into tall grass and abandoned cars. To the right was like a cemetery/garden area or something? If you kept going straight ahead, there was an abandoned town/city. There was a radio station playing, but I don't remember what it was. Some of the buildings you could go inside were a diner, a bar with a radio playing old timey music, and a gym.