Gran Turismo HD Concept

Gran Turismo HD Concept sometimes GTHD Concept with "HD" standing for high-definition), was the first installment of the Gran Turismo racing series to be released on the PlayStation 3. It was made available as a free download which was released on the PlayStation Store on December 24, 2006. A Blu-ray Disc version, called "Install Disc", was released in Japan in limited quantities in September 2007. This game was intended to be a sneak preview, in the likes of Gran Turismo Concept, preceding the release of a full version title but the Gran Turismo HD project was cancelled and replaced by Gran Turismo 5 Prologue.
On the September 22 2006 Tokyo Game Show opening, Famitsu's website released details and a screenshot about a new Polyphony Digital project, Gran Turismo HD, scheduled from a December release[1]. Two versions would be simultaneously released, the Blu-ray Disc based "GTHD Premium" (GTHDプレミアム) and the PlayStation Store downloadable "GTHD Classic" (GTHDクラシック)[2].

During the Tokyo Game Show, Polyphony Digital unveiled the first Gran Turismo HD teaser, it featured HD renders of five cars: Nismo GT-R R-Tune R1 '99, Honda S2000 '99, TOM'S Castrol Supra JGTC '99, Ford GT '05 and the Ferrari 599 GTB Fiorano '06. The first four cars were available in Gran Turismo 4 but didn't appeared in late GTHD trailers, though the Ferrari was featured in Gran Turismo HD Concept. Kazunori Yamauchi confirmed the full version of Gran Turismo HD was scheduled for a December 2007 release in Japan. Among the planned contents he introduced an "iTunes-like" download service and various download packs including additional cars and tracks, advanced AI or car damage, all of which being compatible with the future Gran Turismo 5