Independent game developer Charlie Chapman posted on X that he is currently developing a GTA-style game using real-world map data.
An Attempt to Create a Global-Scale GTA
This experimental project uses real-world map data in the public domain to build a sandbox-style world. Charlie Chapman, the developer behind this project, commented, “It’s what you’d get if GTA and Apple Maps v1 had a baby.”
The constructed world features global-scale weather systems—such as rain, wind, and storms—which players can observe. Buildings contain procedurally generated interiors, and vehicles like skateboards, snowboards, airplanes, and rockets have already been implemented, allowing players to travel around the world. A photo mode has also been implemented.
Most of this development is being driven by AI and is reportedly carried out using three Macs at home and “Claude Opus 5.5.” Charlie Chapman explains that his workflow involves reviewing the work done by Claude Opus 5.5 before bed, testing the game, giving instructions for the next steps, and then checking the results the following day.
Unfortunately, this project has not been made publicly available. The latest updates are posted periodically on his X account.
