Anomic

Thrown into the anarchy of a desert town surrounded by the nothingness of Nevada, you are meant to stand on your own legs to earn money through many different ways. Join the Sheriff department and keep the crime behind a line, become a Trucker and help get goods to where they belong, open up your own shop selling a variety of items to other players, or be a Criminal hiding in the canyons to make cash through illegal ways.

Anomic is set in 1992.

Make sure to read the rules! https://devforum.roblox.com/t/-/2452477 

Private servers provide a set of commands to their owners (some of those commands can be shared with the 'cmdwl' command).