this could be used as map data for an open source GTA clone
OpenStreetMap community
Everything #OpenStreetMap related is welcome: software releases, showing of your work, questions about how to tag something, as long as it has to do with OpenStreetMap or OpenStreetMap-related software.
OpenStreetMap is a map of the world, created by people like you and free to use under an open license.
Join OpenStreetMap and start mapping: https://www.openstreetmap.org.
There are many communication channels about OSM, many organized around a certain country or region. Discover them on https://openstreetmap.community
https://mapcomplete.org is an easy-to-use website to view, edit and add points (such as shops, restaurants and others)
https://learnosm.org/en/ has a lot of information for beginners too.
As this uses the same toolset, tags, etc as OSM, the real osm world map could be used the same way.
Actually there are existing games which use osm as a map. In 112 Operator you play as an operator and you have to send rescue forces to real locations on osm. At the beginning of the game you can select any real city in the world: https://store.steampowered.com/app/793460/112_Operator/
It's here: https://store.steampowered.com/app/1793260/Delivery_INC/
Same publisher, I guess gameplay is also similar. There is also one in the works from them, you have to defend from zombies anywhere, and it seems it will in 3d unlike the previous ones: https://store.steampowered.com/app/1465460/Infection_Free_Zone/ I hope they will use the Simple 3D Building scheme.
This is really neat!