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Image: reddit.com · Video still: opus 5.5 - clone of geometry wars for dos

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A Geometry Wars clone for DOS

A Reddit post about Opus 5.5 building the twin-stick shooter for MS-DOS.

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Credits

  • Reddit poster Real-Leek-3764 Source ↗

Earliest dated source: 8 Oct 2026

The full story

A Geometry Wars-style twin-stick shooter for MS-DOS, running on a modern 386SX laptop clone with a 33 MHz processor and 16 MB of RAM.

Claude Opus 5.5 wrote it from a single prompt. The maker specified MS-DOS 6.22 on a 386SX, sound through the motherboard speaker, and input from the keyboard or a joystick on the sound card's game port, and says it worked first time.

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Sources

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

  • Lemmy: opus 5.5 - clone of geometry wars for dosBlog or write-upv.redd.it
    Published 8 Oct 2026

    The maker's video post in r/ClaudeCode showing the game running on the laptop, with the prompt details in the comments.

  • Reddit: opus 5.5 - clone of geometry wars for dosForum threadreddit.com
    Reddit poster: Real-Leek-3764Posted 8 Oct 2026

    If it disappears: archived copy of Reddit: opus 5.5 - clone of geometry wars for dos (opens in a new tab)

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