BellaOnline Ico Walkthrough: Full walkthrough for Ico, including special techniques for the more difficult areas.
GameSpot - ICO (ps2): With links to reviews, previews, walkthrough and screenshots. Game rated 8.5 of 10.
Ico Flash: Fan site with walkthrough, story, music, picture gallery, RealPlayer movies, and downloads (desktop wallpaper, screensaver, papercraft patterns, MIDI). [Requires JavaScript, Flash.]
Level 80: Tips on the final battle for this game on the Playstation 2.
MobyGames: Ico: Description, credits, release information, cover art, screenshots, reader reviews, and technical specifications.
SCEA: Ico: Official site of US/Canada release. [Requires Flash 5 and QuickTime 4.]
SCEE: ICO: Official site of the European release.
UHS: Ico Hints: Gradual hints in a question-and-answer format.