Terra Ring

While there are some differences, the main factor of these worlds are that they are almost exactly like ours. The technology level is similar, any fantastic elements within them are generally mundane in their application, and will generally be composed of humans. There are generally substantial differences in the worlds that separate them from ours, ranging from simply taking place in entirely fictional locations to being post apocalyptic.

Examples- Resident Evil, Saints Row / Grand Theft Auto, Fallout