Zelda - Oni Link Begins.
this was ported over to xbox by freakdave.
original pc site.
Story : Brought down by a terrible curse since his recent victory on the Dark Lord, Link is changing, day by day, into a powerful creature with a destructive nature named Oni-Link. Bannished from Hyrule, the young hylian asks the princess Zelda some help. She shows him his last hope: a portal to a secret world.
thanks go to the original devs of the game and to freakdave for the great xbox port.