Borderline fact: Green Hill Zone on Sonic 1 features the greatest, most sumptuous videogame music ever committed to cartridge.
What we didn't know is that, had you ever heard the music slowed down to a sixth of its speed, you would essentially be listening to Aphex Twin's more ambient work.
Slow it down even further, and the punchy chiptunes of Green Hill Zone 2 become a beastly Brian Eno track. It's genuinely uncanny. It's kind of horrifying. It's all a bit BrassEye.
[EDIT: It's Sonic 1, not 2!]