maybe you already know this site, i dont know.
i was surfing the web when i found that on a forum.
here
some exemples :
Super Mario Bros for NES (0:05:06)
Morrowind, The Elder Scrolls III for PC (0:07:30)
Super Mario 64 for Nintendo 64 (0:19:47)
The Legend of ZELDA for NES (0:34:04)
it's just...