Play Quake on an oscilloscope

Oscilloscopes are typically used to track the variance of an electrical signal. It's a simple job that mostly involves a lot of wavy lines. They're good for games too though; An oscilloscope gave rise to Pong's great-grandfather, but this version of Quake is on a whole other level. Creator Pekka Väänänen explains the hack in great detail on his blog but really the video speaks for itself.