It has a manliness meter.
You have an eye-beam that allows you to stare random people down and make them flee you in terror.
Its subtitle is "Badass Rumble."
It has the customization and mechanics of God Hand with the control of GTA.
And it's fucking hilarious.
If you have a PSP, and you like fun beat-em-up games, you need to at least rent Kenka Bancho if not buy it outright.