Hokuto No Ken: Legend Of The Final Hero is a cancelled game that was in development, probably for the Playstation 2, by an italian software house called Dokroton. The project started in 2006 / 2007 but sadly it was abbandoned in 2008 for copyright problems. Hokuto No ken, also known as “Fist of the North Star” is a Japanese manga series written by Buronson and drawn by Tetsuo Hara that was serialized in Weekly Shōnen Jump from 1983 to 1988.
Only 2 videos of gameplay from an early prototype / alpha version of Hokuto No Ken: Legend Of The Final Hero still exists.
Thanks to Alessio for the contribution!
Videos: