3d.city Game Online
3d.city is free and open source (GPL-3.0). Original project: github.com/lo-th/3d.city.git
How to Play 3d.city
Place roads, zones and buildings on an isometric grid and watch a low-poly metropolis grow with animated traffic. Select tools from the toolbar, click the map to build, and balance residential, commercial and industrial zones the classic way — a gentle SimCity-style loop with no pressure and no fail state.
3d.city History & Background
3d.city (styled 3d.city) is an open-source city-building sandbox created with Three.js — a hobby project that grew into one of the most impressive lightweight 3D experiences in the browser, proving a full 3D editor can run in vanilla JavaScript.
3d.city Tips & Strategy
Roads first: every zone needs road access to develop, so sketch the transport skeleton before placing anything. Mix zone types adjacently — industry next to homes wastes land value in classic SimCity logic and this sandbox follows suit. Save the skyline for last; dense towers grow from small blocks given time and traffic.
Why Play 3d.city?
Zero friction is the biggest one: 3d.city runs right here in your browser — no download, no installer, no account, and nothing to pay. Because it is an open-source game (GPL-3.0), you get an authentic experience with no ads inside the game, no energy timers, and no upsells. It loads in seconds on any modern device, works alongside other tabs without eating your disk, and you can play it at home, at school or on the go as long as you have a browser.
Key Features of 3d.city
- Instant play — the whole game streams into your browser tab in seconds.
- Completely free — open-source (GPL-3.0), with no payments or locked features.
- Free to play in your browser — nothing to install, nothing to sign up for.
- Runs anywhere — Chrome, Edge, Firefox and Safari on desktop and mobile.
- Local saves — your progress stays in your own browser's storage.
- Full screen ready — one click switches to an immersive fullscreen view.
How 3d.city Works
3d.city is built with web technologies and delivered through this page in an embedded frame. When you press play, your browser downloads the game's code and assets — a few kilobytes to a few megabytes — and runs them locally at full speed. All the processing happens on your own device: input goes straight from your keyboard and mouse to the game, and rendering happens on your GPU. That is why browser games like 3d.city start instantly and feel just as responsive as downloaded ones.
Frequently Asked Questions
How much does 3d.city cost?
Nothing. 3d.city is a free, open-source game (GPL-3.0); on ArcadeQuokka it plays straight in your browser with no account and no download.
Is there anything to install for 3d.city?
No. The game runs entirely in your browser tab — open the page and you are playing. Nothing to install, nothing to set up.
What is a good opening strategy in 3d.city?
In games like 3d.city, the opening is about economy, not combat: build up before you pick a fight, watch what your neighbors or opponents commit, and never spend everything at once. Most runs are lost in the first five minutes of impatience, not the endgame.
Can I play 3d.city on mobile?
Yes, in most cases — it runs in any modern mobile browser. Some games are simply better with a physical keyboard, and if a game supports touch controls they appear on screen automatically.