What they did
Ralfazza Rajariandhana, who has a computer science degree, wanted to race Claude at The Farmer Was Replaced, a Steam game where you farm by writing Python for a drone. They opened a fresh save and gave Claude Opus 5.5 control of the desktop through the Claude desktop app, so it could screenshot, click, type and scroll in the game's code editor. The prompt asked it to stop at 10, 30 and 60 minutes and wait for permission to continue. Claude read the in-game documentation, wrote and ran code, and spent harvested crops on the skill tree.
How it went
The first try stalled within seconds: typing code also moved the camera, because the game uses WASD for both. On a second try at a higher effort setting, Claude changed the camera keys in settings and then played smoothly. It moved from always harvesting to harvesting only ripe crops, planted trees apart so they grow faster, and replanted dead pumpkins first. It made mistakes too: it ran short of hay for carrots and broke its running code when it bought an expansion. After an hour the farm was a 12x12 grid, which the author says took them hours to reach half of. The run used over a million tokens.
Worth knowing
Computer use is slow here: Claude types code one character at a time, cannot paste, struggles with indentation and sometimes misclicked because the view had scrolled since its last screenshot. It also left basic language features like lists and imports locked until the end, which a human player would buy first.