Games, expansion packs, stuff packs, Store worlds, or kits whose thematics are based on the southwestern sand desert areas of the United States of America, loosely corresponding to Nevada, Arizona, New Mexico, Mojave (California), the western half of Texas, and the southern half of Utah.

The very common UFO and alien themes in the Sims games, have ensured that these kinds of desert settings show up often.

Not to be confused with Wild West-themed games, though there is some overlap.