Google is taking their real world maps data and offered it to game developers. No need to invent a virtual world for your game. Use the real one.

Clementine Jacoby, Product Manager, Google Maps APIs, writing to the Google Maps API blog:

To make it easy to get started, wee’ve brought the richness of Google Maps to the Unity game engine. We turn buildings, roads, and parks into GameObjects in Unity, where developers can then add texture, style, and customization to match the look and feel of your game. This means that they can focus on building rich, immersive gameplay without the overhead of scaffolding a global-scale game world.

“With Google Maps data integrated into Unity, we were able to focus our time and energy on building detailed virtual experiences for our users to find virtual dinosaurs in the real world.” – Alexandre Thabet, CEO, Ludia

https://youtu.be/7Bbd5dbuPBc