Jet Set Radio is a little hard to explain but you can think of it as gang warfare using spray paint and skates. Tag graffiti, run from the authorities, that sort of thing. It's a strange yet fun concept.
"Gaunt granite climbs where gulls wheel and glide, mournfully glide o'er my island."
Thank you for your suggestions! I have played and seen quite a few of those games, you have quite good taste. I do hear a lot of buzz about Jet Set Radio but haven't really been able to glean what that series is about, if you wouldn't mind explaining that in more detail?