From source:
"One of my favorite console games of all time is Jet Set Radio (also called Jet Grind Radio in the USA due to copyright shenanigans), a graffiti-tagging game released in 2000 for the Sega Dreamcast. Sega has since released a version of the game on Steam which is pretty much a direct port of the Dreamcast version, warts and all. There's also a third-party tool that can take transparent PNG files and encode them as custom graffiti sets for the game.
So I made this custom set of dickgirl Birdo graffiti for the game.
The game just makes so much more sense this way! If you're going around the city spraying this sort of filth all over the place, it's only natural that they'd be coming at you with SWAT teams and tanks and whatnot. "