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Image: reddit.com · Video still: Opus 5.5 built the vehicles and physics for my Road Rash x DiRT mashup in about 3 days. It couldn’t crack the dirt bike

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A Road Rash and DiRT mashup game with four vehicles

Claude Opus 5.5 built the vehicles, physics, drift boost and jump pads in about three days, but struggled with the dirt bike.

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Credits

  • Reddit poster titkun Source ↗

Earliest dated source: 9 Oct 2026

The full story

An experienced game developer wanted to see how far Claude could take a real game in a few days. Opus 5.5 built the four vehicles, the physics, drift boost, jump pads and rockets for a mix of Road Rash and a rally game.

The hardest part was getting it to treat tyres and shocks in an arcade, fun way, as it kept pulling towards realism. The dirt bike, expected to be the most fun, ended up the jankiest and is still being worked on. The game plays in the browser.

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Sources

From a short post by the maker, so the details are as they tell them.

  • Reddit: Opus 5.5 built the vehicles and physics for my Road Rash x DiRT mashup in about 3 days. It couldn’t Forum threadreddit.com
    Reddit poster: titkunPosted 9 Oct 2026

    The maker's post on r/ClaudeAI.

    If it disappears: archived copy of Reddit: Opus 5.5 built the vehicles and physics for my Road Rash x DiRT mashup in about 3 days. It couldn’t (opens in a new tab)

  • The project: sandscape.appBlog or write-upsandscape.app

    Linked in the post.

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Prompt & Solder

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What this is. Real projects where people used Claude to build, fix, port, revive or take apart something, from jailbroken Kindles to rebuilt DOS games, plus the times it went badly wrong. Every build links to where it was shared, and every source is listed here.

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