Doom can run on an Apple Lightning to HDMI adapter.
In a video uploaded on February 2, first shared by MacRumors, developer nyan_satan showed off a port of the classic video game Doom running on Apple’s Lightning to HDMI adapter. The YouTuber is known for their work in creating tools and dual-booting different versions of iOS.
This is only possible because the Lightning to HDMI adapter features a dedicated system-on-chip with a processor inside. It also runs a basic version of iOS, stripped down to only the most basic of features, allowing the dongle to process video signals but not much else.