MORITURI
A 3D gladiator platform fighter that runs in the browser, from duels to four-way melees in arenas that fight back; in closed alpha, built almost entirely with Claude Code, with Codex reviewing.
Teaser onlyNot playable yet · Watch the developer's video ↓
Where to play
The developer has shown this game in a public video, but there is no public build yet. We update this page when there is news.
Watch the developer's video (Reddit r/Morituri (u/Ylboomhs)) ↗
About MORITURI
MORITURI is a 3D gladiator platform fighter that plays in the browser, on computers and, with touch controls, on phones. There are no health bars: every hit raises a rival's damage, and the higher it climbs, the farther they fly, until they are knocked off the stage or into a hazard such as the trapdoors in Capua, Vesuvius over Pompeii, ramming triremes in the Naumachia or the lions of the Colosseum. Five gladiators, each with a weapon, two abilities and an ultimate, fight in 1v1, 2v2, 3v3 or free-for-all matches online, and a story campaign, The Road to Rome, has its first two chapters in the alpha. The developer, Kevin, posting as Ylboomhs, writes that Claude Code wrote most of the code while the developer directed and validated, and that Codex does second-opinion reviews and “the grunt work”. Every model, texture and sound is generated in code. The game is free and in closed alpha: players request access on the official site and are let in in waves.
How it was built
Partially verifiedThe developer writes that Claude Code (Opus 5.5) wrote most of the code — about 47,000 lines of JavaScript — plus its own test harness: headless-browser checks for clipping and camera angles, netcode tests with several tabs as players, and bots that playtest the game overnight. The developer's part was direction, playtesting and notes. The first version ran as a Claude artifact on claude.ai, with live multiplayer inside the artifact. Claude also produced the trailer from seeded bot matches through a hidden capture mode, by the developer's account.
- Developer“Claude Code does most of the building, and Codex does second-opinion code reviews and the grunt work.” — Reddit r/aigamedev (u/Ylboomhs)
- Developer“My part was direction, playtesting and notes. Claude wrote the code, plus its own test harness …” — Reddit r/ClaudeAI (u/Ylboomhs)
Used as a second, independent reviewer for security and optimization and for “grunt work”, not for creative direction; the developer names the model as GPT 6 Astra / “OpenAI's Codex Astra”.
- Developer“I used OpenAI's Codex Astra as a secondary reviewer for security and optimization, but not for creative direction.” — Reddit r/ClaudeAI (u/Ylboomhs)
Plain JavaScript and three.js in the browser; online matches run on Cloudflare Workers and Durable Objects, with the game's own sign-in. All art is procedural (models built in code, textures drawn on a canvas, no model files), sound is synthesized with WebAudio, and the announcer speaks through the browser's built-in speech synthesis.
- Engine / framework
- Three.js
- Languages
- JavaScript
- Team size
- Not disclosed
- Initial build time
- About one month by 9 Oct 2026, per one post (another, three days earlier, says the last few months)Developer ReportedReddit r/ClaudeAI (u/Ylboomhs)
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“Claude Code wrote most of the code, while I directed and validated.”Verification notes: AI use, stack and development time come from the developer's Reddit posts of 3–9 Oct 2026 (r/SoloDevelopment, r/ClaudeGameDev, r/aigamedev, r/Morituri, r/vibecoding, r/ClaudeAI); the developer signs the r/Morituri trailer post “I'm Kevin, the developer”, and the account has a long first-person history. The posts differ on development time (“over the last month” vs “the last few months”); both are shown. When checked on 8 Nov 2026 the official site still offered only alpha access by request (“We're letting players in a few at a time”), with sign-in for approved players, so there is no public build. The developer calls the game “fully playable” in its alpha state. Opponents in the trailer and in testing are game bots; the announcer uses the browser's speech synthesis, a fixed text-to-speech feature, and no source mentions a language model at play time. The settings use historical Roman places (Capua, Pompeii, the Colosseum). Team size and location are not stated.
Development history
Game revealed with gameplay clips; free closed alpha opens, with players let in in waves.
Official trailer published; the story campaign's first two chapters are in the alpha.
DeveloperReddit r/Morituri (u/Ylboomhs)
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.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
