Game

The Duke's Lawn — Multiplayer Mowing Simulator

Max Blade

@_MaxBlade · 23.7K followers

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Sep 22, 2026

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A live multiplayer lawn mowing game built entirely by Claude Opus 5.5 and deployed to a real server within one session. You ride a vintage first-person mower across a sprawling estate, cracking beers and cigars while other players join and tear up the grass beside you. The UI shows a minimap, a "Great Lawn restored" progress bar, and named player characters roaming the field. @_MaxBlade streamed it live and his chat jumped in — proof the thing actually ran in the wild.

First-person riding-mower perspective with physics, a minimap, and a live lawn-restoration progress tracker
Real multiplayer: viewers joined the server live during the stream and played together
Beers and cigars as in-game items — Opus 5.5 added the absurd details unprompted

“Opus 5.5 built a multiplayer lawn mow simulator with beers and cigars Made it live on my server and chat joined. the future is looking insane.”
— @_MaxBlade

browser-game multiplayer simulation one-shot webgl claude-opus-5-5 3d playful