Hot and bothered by yesterday's look at Forza 3? Polyphony Digital's no slacker, evidenced by this über-slick look at the retail version of Gran Turismo 5 and Gran Turismo Mobile.

Live at the E3 Expo, Kazunori Yamauchi released two new puzzle pieces to his highly-polished Gran Turismo series. The first? Gran Turismo 5 for the PS3, a direct competitor to Turn 10 Studios just-released Forza Motorsport 3. Packed with active weather effects, night racing and damage modeling, Yamauchi promises GT5 will be the most realistic Gran Turismo game yet. The addition of both NASCAR and WRC licenses is an interesting surprise and will likely bring fans of those racing series games to a unified GT racing platform. A release date will be announced later today.

But the biggest surprise was Yamauchi and Polyphony Digital finally releasing the long-awaited Gran Turismo Mobile for the Sony PSP portable system. Packed with 800 semi-customizable cars and 35 tracks as well as the ability to trade and race with others over the PSP's ad-hoc connectivity. GT Mobile looks to be the overall winner of the two by offering true portable Gran Turismo gameplay and will be released in October. [gtplanet]