Arena Game
Free · play online in your browser, no download
A 3D browser arena for two: run your soldier, buy tanks, helicopters and infantry, and claim turrets and bases for five minutes of points. The README credits all the source code to Claude Code.
Official site arena.ibuildstuff.eu, verified Nov 3, 2026. Linked from the developer's Show HN post, the README of the developer's own repository and the developer's website (ibuildstuff.eu).
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop or mobile browser. No download.
Browser (no download) · Mobile · Official link verified Nov 3, 2026.
- View on GitHubGitHubReleased · Source code (MIT)Free
Source code repository, not a place to play.
Official link verified Nov 3, 2026.
About Arena Game
Arena Game is a free real-time 3D multiplayer strategy game in the browser. Two players each control a soldier who moves and shoots directly, while passive income and kill rewards pay for tanks, helicopters, snipers, rocket launchers and super units bought at buy zones; units march on the enemy base on their own and fight whatever comes into range. Neutral turrets, forward bases and barracks around the map can be claimed for defence and forward spawning, and health packs heal the soldier. A match lasts five minutes and the side with more points from kills wins. You can queue for another player, practise against computer opponents on Easy, Medium or Hard, or watch live games; there are two maps, a leaderboard, sound effects and touch controls with two joysticks on mobile. Signing in with GitHub or Bluesky saves stats; guests can play too. The developer, Tom Harvey (tombuildsstuff), says it is inspired by the Precinct Assault mode of Future Cop: LAPD, and that it was built with Claude Code “without writing a single line of code”: a playable version after about 1.5 hours of prompting and the shared version after about 12. The README credits Claude Code with all the source code, the game design and balancing, the 3D work and the networking. Free in the browser; the source is under the MIT licence.
How it was built
Partially verifiedIn the Show HN post “I built a 3D web-based multiplayer game with Claude Code” (15 Jan 2026, UTC) the developer writes of wanting to see “how far I could really push it without writing a single line of code”: “Fast forward ~1.5 hours of prompting and I had a fun MVP - and within ~6h I was sharing it with friends. ~12 hours of prompting later - without writing a single line of code - I'm blown away at the result.” The README's “Built With AI” section divides the work: Claude Code did all the source code (the Go server, JavaScript client, HTML and CSS), the game design (mechanics, balancing, unit stats, economy), the 3D rendering, the networking, the computer opponents, the OAuth sign-in, the documentation and the search for sound effects; the developer did the prompting and direction, set up the GitHub OAuth app, picked the final sounds and handled hosting and DNS. The game's About panel says the entire game was coded by Claude Code. No model is named.
- DeveloperREADME, “Built With AI”: Claude Code (AI) — “All source code: Go server, JavaScript client, HTML, CSS”; Credits: “Code: Claude Code by Anthropic”. — GitHub (tombuildsstuff)
- DeveloperAbout panel: “This entire game was coded by Claude Code (Anthropic's AI coding assistant), with prompts and direction provided by @tombuildsstuff.” — Tom Harvey (tombuildsstuff)
An authoritative Go server running at 20 ticks per second, with each game room in its own goroutine, sends state over WebSockets to a vanilla JavaScript client that renders the arena with Three.js, per the README; the client is embedded in a single server binary. The computer opponents use behaviour trees with difficulty levels. Sound effects come from Freesound.org under CC0 and CC BY licences, suggested by Claude Code and picked by the developer. The developer says Claude estimated the game would take 2 to 3 weeks to build by hand; a first playable version took about 1.5 hours of prompting and the version shared on Hacker News about 12 hours. The repository's first commit is dated 14 Jan 2026 and work continued until at least 28 Oct 2026.
- Engine / framework
- Three.js (client) with a Go server
- Languages
- JavaScript, Go
- Team size
- Not disclosed
- Initial build time
- About 1.5 hours of prompting for a playable version; about 12 hours for the version shared on Hacker NewsDeveloper ReportedHacker News (tombuildsstuff)
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- ~100% of shipped codeDeveloper ReportedGitHub (tombuildsstuff)
“~12 hours of prompting later - without writing a single line of code - I'm blown away at the result.”- Show HN: I built a 3D web-based multiplayer game with Claude Code
- tombuildsstuff/web-arena-game (GitHub)
Verification notes: AI use from the Show HN post by tombuildsstuff (15 Jan 2026, 21:14 UTC), read through the Hacker News API, and from the repository README and the game's About and How It Was Built panels, all read on 7 Nov 2026. The 100% AI code share reflects the README's “All source code” credit to Claude Code and the post's “without writing a single line of code”. The name Tom Harvey comes from the developer's website ibuildstuff.eu, which the Hacker News profile and the README link. Features, rules, unit costs and the tech stack come from the README and the live page; repository dates from a clone (53 commits, 14 Jan to 28 Oct 2026). Future Cop: LAPD is named by the developer as the inspiration for the game mode; the README notes that its rights belong to Electronic Arts, and we found no names or assets from it in the game, so no IP notice is shown. The computer opponents are scripted behaviour trees; we found no calls to AI services in the repository. The game was not played.
Development history
First commit to the public repository.
ObservedGitHub (tombuildsstuff)The developer shares the game and its source as a Show HN (21:14 UTC).
DeveloperHacker News (tombuildsstuff)
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 the browser on desktop and mobile; optional sign-in with GitHub or Bluesky saves stats for the leaderboard.
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
GitHub
No public metrics recorded for this listing.
Not publicly available: GitHub stars.
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 |
|---|---|---|---|
| Show HN: I built a 3D web-based multiplayer game with Claude Code Hacker News (tombuildsstuff) | Social post | Jan 15, 2026 | Nov 3, 2026 |
| web-arena-game README: Arena Game GitHub (tombuildsstuff) | Repository | Not confirmed | Nov 3, 2026 |
| Arena Game Tom Harvey (tombuildsstuff) | Official site | Not confirmed | Nov 3, 2026 |
| Tom Harvey: AI Product Builder ibuildstuff.eu | Official site | Not confirmed | Nov 3, 2026 |
| Official game page (language check) Tom Harvey (tombuildsstuff) | Official site | Not confirmed | Nov 3, 2026 |
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