Nintendo's Alarmo alarm clock has been hacked to run the classic game Doom, thanks to a USB exploit discovered by hacker GaryOberNicht. The feat was achieved without modifying the Alarmo's internal hardware, instead using a USB mode and the USB-C port to load custom firmware from an external source.

The hack, which is playable and demonstrated in a video, has been made possible by GaryOberNicht's method of pointing the Alarmo to custom external firmware via USB. The instructions and software have been made available on Github, allowing other Alarmo owners to replicate the hack.

This development has significant implications for the tech community, as it opens up possibilities for custom firmware and game console mods on the Alarmo. However, it remains to be seen how Nintendo will respond to this hack, given its history of actively pursuing copyright disputes.