Browser City Tycoon
Free · play online in your browser, no download
Link villages with roads, rails, airports and ports and watch them grow into cities, in an isometric transport tycoon built as one HTML file. The developer credits the code to Claude.
Official site browsercitytycoon.com, verified Nov 3, 2026. Linked from the developer's own Reddit post on r/aigamedev and from the game's YouTube trailer description.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleased · Version 1.0Free
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About Browser City Tycoon
Browser City Tycoon is a free isometric transport tycoon game for desktop browsers. You start a company in 1980, build roads and railways (with automatic bridges), bus and truck stops, train stations, airports and ports, and carry passengers and cargo between towns, which grow from cottages to skyscrapers as your lines keep bringing people in. There are five vehicle families with five models each, which age, break down and can be upgraded; fourteen industries in seven production chains; 50 attractions and 25 landmarks, a town council and a bank; four seasons that affect the economy and a day and night cycle. The map starts at 96×96 inside a 144×144 world with twelve regions to unlock, plus three maps abroad (Tropical Isles, Alpine Valley and Desert Oasis). Neighbours drop by with delivery orders, and there are 20 company levels, 152 achievements, daily tasks and login rewards, and a Daily Challenge in which everyone gets the same map and 30 real minutes. Every building, vehicle and tree is drawn in code. You can play as a guest, with progress saved in that browser, or sign in with Google for cloud saves across computers and the leaderboards. The developer, who works full-time in finance and posts as u/OpenTech-0994, built it over two weeks of evenings and lists the stack as “Claude (code), Suno AI (music) + Gemini (prompt adjustments)”; the game's About page says it was designed and directed by the developer and built with Claude over more than twenty versions, inspired by OpenTTD and SimCity. It needs a mouse and keyboard; phones and tablets are not supported yet.
How it was built
Partially verifiedIn a post on r/aigamedev (25 Oct 2026, UTC) the developer says they spent two weeks of evenings after their day job “vibe-coding (or vibe engineering)” the game step by step, and lists the stack as “Built with: Claude (code), Suno AI (music) + Gemini (prompt adjustments)”, a game in “vanilla JS + HTML5 Canvas in a single HTML file”, Firebase for Google sign-in, cloud saves and leaderboards, and Cloudflare Workers for hosting, at a cost of “Claude Pro + The domain, everything else on free tiers”. The game's About page says it was “designed and directed by me and built with Claude, Anthropic's AI assistant, over more than twenty versions”: the developer described what they wanted, played each version, decided what felt wrong and what to add next, and repeated. The in-game credit reads “Made with Claude.ai”. Which Claude app was used beyond the Claude Pro plan is not stated.
- DeveloperAbout page: “The game was designed and directed by me and built with Claude, Anthropic's AI assistant, over more than twenty versions, with some technical advice from Gemini along the way.” — browsercitytycoon.com
Listed in the developer's post as “Gemini (prompt adjustments)”; the About page says Gemini gave “some technical advice” along the way. It is not credited with writing code.
A single web page in plain JavaScript drawn on an HTML5 canvas, with no install. The 120+ building designs, 75 attractions and landmarks, 25 vehicles, trees, animals and people walking the streets are vector shapes generated by the game, and the neighbours' portraits are assembled from parts. Sound effects are synthesised live with WebAudio; the soundtrack was composed with Suno AI. Cloud saves, Google sign-in and leaderboards run on Google Firebase, and the site is hosted on Cloudflare Workers. The neighbour characters and the tutorial guide, Daniel, are scripted; the game's code calls no AI services (observed).
- Engine / framework
- None (vanilla JavaScript)
- Languages
- JavaScript
- Team size
- 1 (solo)Developer Reportedbrowsercitytycoon.com
- Initial build time
- Two weeks of eveningsDeveloper ReportedReddit (u/OpenTech-0994)
- Development time
- 2 weeksDeveloper ReportedReddit (u/OpenTech-0994)
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“Built with: Claude (code), Suno AI (music) + Gemini (prompt adjustments)”- After 2 weeks of late-evening coding after my day job, I finished my browser game Browser City Tycoon (r/aigamedev)
- About Browser City Tycoon: a dream game built with AI
- Browser City Tycoon - PC Trailer (Claude.AI Coding Experiment) (YouTube)
Verification notes: AI use from the developer's post by u/OpenTech-0994 on r/aigamedev (25 Oct 2026, 13:47 UTC), read from the Arctic Shift Reddit archive on 8 Nov 2026, and from the game's About page and in-game information dialog; the post links the site and the YouTube trailer, whose channel is named Browser City Tycoon. Features from the About, FAQ and Updates pages (Version 1.0, October 2026), re-read on 8 Nov 2026. The code claim rests on the developer's role list “Claude (code)” and the About page's “built with Claude”; no share of AI-written code is stated, so none is recorded. The developer says only that they work full-time in finance; the site does not name a person, and team size 1 is from the About page's first-person account (“designed and directed by me”). The release date is the day the developer presented version 1.0 on Reddit; the Updates page gives only October 2026. OpenTTD and SimCity are named by the developer as inspiration; no material from them is used, so no IP notice is attached. The game's single HTML file (about 480 KB) loads Firebase from Google and calls the site's own referral API; it contains no AI service addresses. The game was not played.
Development history
Version 1.0 is presented on r/aigamedev after two weeks of evening work, with Claude credited for the code; the trailer is posted on YouTube.
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
Browser (official site)
Free in desktop browsers with a mouse and keyboard; phones and tablets are not supported yet. Guest saves stay in the browser; Google sign-in adds cloud saves and leaderboards. The site carries a Google AdSense account tag.
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| After 2 weeks of late-evening coding after my day job, I finished my browser game Browser City Tycoon (inspired by OpenTTD / SimCity) (r/aigamedev) Reddit (u/OpenTech-0994) | Social post | Oct 25, 2026 | Nov 3, 2026 |
| About Browser City Tycoon — A Dream Game Built with AI browsercitytycoon.com | Official site | Not confirmed | Nov 3, 2026 |
| Browser City Tycoon - Transport Empire browsercitytycoon.com | Official site | Not confirmed | Nov 3, 2026 |
| Browser City Tycoon Updates and Release Notes browsercitytycoon.com | Official site | Not confirmed | Nov 3, 2026 |
| Browser City Tycoon - PC Trailer (Claude.AI Coding Experiment) YouTube (Browser City Tycoon) | Social post | Oct 25, 2026 | Nov 3, 2026 |
| Official game page (language check) browsercitytycoon.com | Official site | Not confirmed | Nov 3, 2026 |
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