Cheats Codes Guides: Offers unlockables and hints.
FilePlanet: Various gameplay movies and trailers.
GameSpy: Provides news, and articles.
GameSpy: Preview by Ryan O'Donnell, includes screenshots.
Gran Turismo 4 - Official US site: This is the official Gran Turismo 4 website from Sony Computer Entertainment, Inc.
Gran Turismo 4 at GameSpot: Offers game information, review, screenshots, news, downloads, cheats and more.
Gran Turismo 4 at GameStats: Gran Turismo 4 page which offers news, articles, screenshots, popularity gauge and ranking.
Gran Turismo 4 at GameXC: Offers game info, review, screenshots and news.
Gran Turismo 4 at IGN.com: Offers reviews, previews, game information, multimedia downloads, screenshots, comprehensive guide (for registered users) and more.
Gran Turismo 4 at MetaCritic: This site offers links to a lot of reviews on the game and gives it at "meta" score based on these reviews.
Gran Turismo 4 at UGO's Video Gamer Network: This site provides information related to Gran Turismo 4 including a walkthrough and screenshots.
Gran Turismo 4 information site: Offers screenshots, a car list, and game and track information.
Gran Turismo 4 Resources at GameSpy: Media and other downloads for Gran Turismo 4 offered by Gamespy Network.
GT4 Gamesaves: We provide a large number of gamesaves for Gran Turismo 4 including the black cars and lots of credits.
GTPlanet: Features game information for the whole Gran Turismo series of games including Gran Turismo 4. Also has thriving community forum.
GTVault.com: This site provides detailed, user-submitted car settings for Gran Turismo to help you tune your car just right.
Racers Edge - Gran Turismo 4: Offers real-time record lap submission database for live competition
Rapid Gaming - Gran Turismo 4 Review: Gran turismo 4 review
The Armchair Empire: Preview written by Mr. Nash. Includes screenshots.