Simon Willison builds Battle Drones, a browser RTS with audio multiplayer

AISimon Willison says he built Battle Drones, a Command & Conquer style real-time strategy game that runs in the browser. He mainly used Claude Opus 5.5 for the work, and the game supports device-to-device multiplayer over an audio link.

Screenshot of a 3D isometric real-time strategy game in progress. HUD at top reads "1:49", "4×", "Ironclad · Industry" (blue dot), "Boom · Industry" (red dot), resource icons and "0:56", with a blue-versus-red balance bar labeled "B" and "R". A banner in the center top reads "DOUBLE KILL" with "Blue" beneath it. The grassy battlefield shows a blue team base in the lower left with a domed command center, a radar dish, two factory buildings and a turret, plus a refinery labeled "+200" where blue supply trucks carrying crates gather around ore deposits, with floating "+45" labels by the trucks. A gravel road runs diagonally from the base to the upper right, where blue tanks fire a laser at a white enemy unit. Near the base, red enemy tanks under fire show a "+45" label, while blue turrets shoot at them. Rocky outcrops sit at the top left and right center, clusters of low-poly trees line the right and bottom edges, and a minimap is in the top right corner. Pause and mute buttons are at the

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Simon Willison · x.comPublished Oct 20, 3:43 PM ET

Original title: I built a Command & Conquer style RTS called Battle Drones, mainly using Claude Opus 5.5, which runs in the browser and includes device-t...

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