Oscilloscope + Nine Inch Nails soundtrack = creepiest game ever.
YouTube channel Kepuli Games got id's shooter up and running on a PC connected to a Hitachi V-422 oscilloscope, a piece of electric signal monitoring gear normally reserved for displaying testing waveforms on a graph. But this oscilloscope was destined for something greater -- making one of the most famous shooters ever even more creepy than its Trent Reznor score already allows.
In this science experiment gone terribly awesome, Quake is running on a modified Darkspaces engine, which then converts images in the game to 96 kHz audio signals. These signals are then displayed on the oscilloscope as some of the most trippy waveform we've ever seen.
The end result is a surprisingly playable game. While there's a bit of a struggle to see doorways and portals, the enemies show up just fine. And since the audio is still coming through standard speakers, you'll still get the classic shotgun blasts, and Nine Inch Nails soundtrack.
Source: Kepuli Games (YouTube)