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"Temu League of Legends" built with Opus 4.8

A weekend test of the model starting from a one-line prompt.

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Credits

  • HN submitter jonnyasmar Source ↗

Earliest dated source: 2 Jun 2026

The full story

As a weekend test of Opus 4.8 with a plain set-up, the author typed one line: "build a temu league of legends, web-only with online, room-based multiplayer". They say it came out fully functional in one shot. They then iterated on everything to make LMAO (League of Mediocre Arena Outcasts), a browser MOBA with two lanes, a jungle, bosses, one to seven players per team and over-eager bots.

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Sources

From the maker's own write-up or code. We summarise what they report; we haven't tested it ourselves.

  • Hacker News: Show HN: LMAO – Temu League of Legends, Built with Opus 4.8Blog or write-uplmaomoba.com

    Play the game.

  • Hacker News discussion (4 points)Forum threadnews.ycombinator.com
    HN submitter: jonnyasmarPosted 2 Jun 2026

    The Show HN post.

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