Activision:Official site from the publisher. Features game background, character and race profiles, screen shots, links, and wallpapers.
GameFAQs: Offers FAQs and walkthroughs.
Heuristic Park: Official site from the developer. Offers screen shots, game features and press quotes.
Ironworks Gaming: Features game information and hints, trainer, patch and map downloads, and a selection of walkthroughs. Offers a message board, too.
TK421's Page: Holds bug and cheating information, class guide, walkthrough, and savegame and patch downloads.