Mega Super Racer
A 90s-style pixel-art kart racer on a modern Mode 7 ground, with up to 32 racers and four-player split screen, in a free browser demo.
Links go to the official store or developer page. Last verified Nov 7, 2026.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- View demo on itch.ioitch.ioDemo · Free browser demo; listed as “In development” on itch.ioFree
Plays in the browser on itch.io. No download.
Browser (no download) · Mobile · Official link verified Nov 3, 2026.
About Mega Super Racer
Mega Super Racer (MSR) is a fast, colourful pixel-art kart racer inspired by 1990s arcade kart games: you drift to fill a boost, grab item boxes and race for pole position in a field of up to 32. The ground is a modern take on SNES-style Mode 7, with fog, parallax skies and sprite-stacked buildings. The free demo has four courses (Twinkle Light City, Hop Hop Depot, Pipi Pops Glacier and Club Nocturne), eight playable racers, races against up to 31 bots and a selection of items, with keyboard, controller or touch controls (three touch layouts, each with a live preview, and optional tilt steering on phones) and up to four-player local split screen on computers. The developer, Arthursoft, says the game was built by one developer in their spare time in a little over three weeks from idea to demo, and that “AI did all of the heavy lifting”: Claude Code with Claude Opus 5.5 and specialist sub-agents wrote the code for a custom Rust engine on SDL3 and SDL_GPU, compiled to WebAssembly for the browser with its own WebGPU and WebGL back ends, while the developer provided the design and “the taste”. PixelLab made the character and kart sprites, Claude-built tools generated most track textures, buildings, sound effects and voices, and the music was produced with SuperCollider and Claude. The full game is planned with more racers, 16 courses, cups, time trials and online racing. Free in the browser on itch.io, on computers and phones; in seven languages.
How it was built
Partially verifiedIn a post on r/aigamedev (6 Nov 2026, UTC) the developer writes that the game “was built entirely by one dev in their spare time with AI tools in a little over 3 weeks from the initial idea to demo. So as you can imagine, AI did all of the heavy lifting.” Claude Opus 5.5, mostly on medium effort, is described as “the backbone of the whole project”: for code, “Claude Code with specialist sub-agents (engine, gameplay, tools, netcode, reviewer), each working in its own git worktree, with GitLab CI building Windows, Linux, Android and web on every release. I provide the design and the taste; the agents write, test and screenshot their own changes.” Per the post, Claude also generated most track textures and buildings through Rust or Python tools, wrote a small synth tool for the sound effects and engine loops and another tool for the characters' gibberish voices, made the music with the developer in SuperCollider (Opus 5.5 on high effort, sometimes Fable 5.1), and auto-translated the game into six languages from English, which the developer cannot check. The developer notes that Claude was poor at drawing pixel art directly and had to be asked several times to cut back its tests. In a reply the developer agrees that AI “writes the bulk of the code”.
- Developeritch.io page: “Mega Super Racer has been made with the use of AI tools in all areas of development.” The AI disclosure ticks AI Assisted, Code, Graphics, Sounds and Text. — itch.io
A custom engine in Rust on SDL3 and SDL_GPU (Vulkan, Metal, Direct3D 12), with no off-the-shelf game engine. A deterministic simulation crate runs at a fixed 60 Hz with no input/output or clock, shared by the client, a future server and the bots, so that online play can be added later. The browser build compiles Rust to WebAssembly with Emscripten and uses the project's own WebGPU and WebGL back ends for SDL_GPU, with shaders converted from GLSL to SPIR-V to WGSL at build time; the developer says this cut the first-load shader compile in Chrome on Windows from about 17 s to about 4 s. PixelLab made all character and kart sprites, with touch-ups in Aseprite; the tracks are painted by the project's own spline-based generator. Suno was tried for music but dropped. Per the developer, the first afternoon produced eight rough courses, all 16 characters, some power-ups and four-player split screen, and the rest was iteration with constant playtesting. No AI runs in the game.
- Engine / framework
- Custom Rust engine (SDL3, SDL_GPU)
- Languages
- Rust
- Team size
- 1 (solo)Developer ReportedReddit (u/ArthursoftDev)
- Initial build time
- A little over 3 weeks from first idea to demoDeveloper ReportedReddit (u/ArthursoftDev)
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“I provide the design and the taste; the agents write, test and screenshot their own changes.”Verification notes: AI use, engine and pipeline from the developer's post on r/aigamedev by u/ArthursoftDev (6 Nov 2026, 20:26 UTC) and replies under it, read from the Arctic Shift Reddit archive on 7 Nov 2026; the post links the itch.io page. Demo contents, controls, planned features, AI notice and disclosure, languages and tools from the itch.io page, re-read on 7 Nov 2026 (published 30 Oct 2026, 15:36 UTC; status In development; made with Aseprite, SDL and Rust). “AI did all of the heavy lifting” and “the bulk of the code” are not shares, so no AI code percentage is recorded. Team: the post says one developer built the game, with about 20 years in the industry; the itch.io page is signed “The MSR Team” and the post sometimes says “we” and “our” (see conflicts). Languages: the itch.io field lists English, Spanish (Latin America), Japanese, Korean, Portuguese (Brazil) and Simplified and Traditional Chinese; the developer says the six translations are Claude's and unchecked. The developer says 16 characters exist while the demo offers eight; the full game's 64-player online racing and Steam release are plans, not features. The web build's loader script was checked and contains no AI service addresses. itch.io shows no rating or download count. The game was not played.
Development history
The free browser demo is published on itch.io (15:36 UTC).
Observeditch.ioThe developer describes the Claude Code workflow and the custom Rust engine on r/aigamedev.
DeveloperReddit (u/ArthursoftDev)
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.
itch.io
Free in the browser on computers and phones; keyboard, gamepad or touch. Native Windows, Linux and macOS apps are planned for the full game.
Not publicly available: itch.io rating, Gross revenue.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| I built a 32-kart Mode 7 racer in Rust with Claude Code: custom engine, browser build, AI-assisted art and audio (free demo) (r/aigamedev) Reddit (u/ArthursoftDev) | Social post | Nov 6, 2026 | Nov 3, 2026 |
| Mega Super Racer - Demo by Arthursoft itch.io | Store page | Oct 30, 2026 | Nov 3, 2026 |
- Team
- The developer's post says the game was built by one developer in their spare time, while the itch.io page is signed “The MSR Team” and parts of the post say “we” and “our”. (Reddit (u/ArthursoftDev), itch.io)
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