IbizaPocholo
NeoGAFs Kent Brockman

This nice chap made DOOM playable on Notepad.exe, for reasons
Soon we'll have DOOM running on literal paper.

Perhaps the most ported game of all time, DOOM has been ported to the Apple Watch, graphics calculators, and even a pregnancy test. But the ports keep on coming, and now we even have it running on unmodified Notepad.exe on Windows 10, using ASCII graphics as a rendering engine. For reasons.
Created by developer and YouTuber Samperson, we can see the above running entirely within a Notepad window on Windows. This is running with zero modifications to the Notepad executable, and is fully playable. Samperson says he plans to release NotepadDOOM in the coming days, too.