Jazz Jackrabbit 3 (alternatively called Jazz Jackrabbit 3D or simply Jazz3D) is the unreleased third installment of the popular PC game series, Jazz Jackrabbit. Spear-headed by Dean “Noogy” Dodrill (an animator for Jazz Jackrabbit 2) and coded by World Tree Games, it was developed for the original Unreal Engine technology in 1999. Like many other mascot characters of the late 90s, Jazz would venture into the realm of 3D for the first time.
Despite interest to develop the game, it never was released after Epic MegaGames failed to find a publisher, and it was canceled sometime in May 2000. Since then, the original proof-of-concept alpha has been leaked on to the internet. [Infos from Wikipedia]
For more infos: www.jazz2online.com/j3f/