You can explore the demo map of Mega City Parkour on Steam today

Keep in mind, this is just a demo map, the real map is way, way bigger, and is highly detailed at street-level.

I created this using Blender + Unreal Engine.

https://youtu.be/ghfGuedtv8w

https://store.steampowered.com/app/3205050/Mega_City_Parkour/