Mash ups involving video game music and "real" music has long been a thing. And here's yet another example that should elicit a "hey, that's actually kinda cool" response from most: Jet Ill Radio, which combines the groundbreaking soundtrack from the Dreamcast classics, Jet Ret Radio and the Beastie Boys' Hello Nasty.
As Destructoid notes, it's a bit rough around the edges in certain respects. But there are parts in which the two elements comes together to esemble peanut butter and jelly:
For those who wish to add Psycosis's handiwork to one's iTunes playlist, the video above can lead you to both the entire mix as one continuous file or everything all chopped up as individual mp3s.