No, that's not a lie - one Pekka V n nen, a Finnish modder, has managed to get the original Quake running on an oscilloscope.

What's an oscilloscope? This:

"An oscilloscope is an electrical testing device used to measure the frequency of an electrical signal over time, and display waveform signals in a graph."

What's Quake? This:

"Quake is a game in which players must find their way through various maze-like, medieval environments while battling a variety of monsters using a wide array of weapons."

You'd be right to wonder just how the hell all of this works, or what it looks like. Luckily for you, you can read about V n nen's trials and tribulations right here, and check it out in video form on this very page:

At the risk of editorialising somewhat: that is so, so cool.