The operating system Microsoft definitely did not make. An interactive parody of Windows 11, Microsoft 365, Copilot, updates, ads, and subscriptions.
By u/RelativeOk1067. Tags: weird. Free to play in your browser, no download.
Play Definitely Not Windows on its own site
Stumbling…
One button.
A random
tiny game.
Every Stumble drops you into a random web game somebody made, whether they vibe-coded it over a weekend or hand-wrote every line. Like it, skip it, keep going.
Or browse top games, new games, guides for game makers, or read about Joystumble.