Play Controller Test Online

Controller Test was a simple diagnostic tool included with the Nintendo Entertainment System, not a commercial game release. It was developed by Nintendo to help users verify that their console and controllers were functioning correctly. It exists purely as a utility, a quiet piece of the NES's technical foundation.

You don't control a character; you press buttons. Each button press on the standard NES controller or the Zapper light gun fills a portion of the screen with a corresponding solid color or pattern. The main objective is to confirm every input works, watching the screen change with each press. The signature mechanics are the immediate visual feedback for each action and the methodical process of testing every single button. There is no pacing or difficulty; it is a systematic check. It feels like a brief, functional handshake between you and the hardware.