Civitas

What it is

Civitas is a city simulation from GitHub account reneodlt that runs in the browser with three.js. You buy plots, plan roads, rail and zones, then watch how commuting, taxes, jobs and traffic shift. Unusually, the world is shared. The main entry is now one unbounded shared world you enter with Join world, and the project notes also describe a local single-player mode and a read-only showcase mode. The creator states in the repository description that the game was built with Claude Code. Resident behavior comes from the game's simulation rules; no generative model is mentioned for it.

Who it's for: Players who like city planning and traffic puzzles and want to build on the same map as other people.

Before you start: It plays in the browser and supports touch gestures such as pinch to zoom; whether it works well on phones is not stated. The shared world sends your actions to a server to keep everyone in sync. Whether an account or payment is needed is not stated. The page is in English. The source code is licensed under AGPL-3.0.

Based on the project's public documentation. Not tested by AI Inspiration World.