Ico Flash
Fan site with walkthrough, story, music, picture gallery, RealPlayer movies, and downloads (desktop wallpaper, screensaver, papercraft patterns, MIDI). [Requires JavaScript, Flash.]
http://hk.geocities.com/icofan/

MobyGames: Ico
Description, credits, release information, cover art, screenshots, reader reviews, and technical specifications.
http://www.mobygames.com/game/sheet/gameId,5158/

GameSpot - ICO (ps2)
With links to reviews, previews, walkthrough and screenshots. Game rated 8.5 of 10.
http://www.gamespot.com/ps2/adventure/ico/

Level 80
Tips on the final battle for this game on the Playstation 2.
http://www.level80.co.uk/ps2ico.htm

SCEE: ICO
Official site of the European release.
http://www.icothegame.com/

BellaOnline
Walkthrough including special techniques for the more difficult areas.
http://www.bellaonline.com/gaming/w/ico/

GameSpy
Review, cheats, and screenshots.
http://ps2.gamespy.com/playstation-2/ico/

IGN
Screenshots, videos, cheats, guide, FAQs, reviews, previews, news, and a message board.
http://ps2.ign.com/objects/014/014833.html

GameStats
Videos, screenshots, score averages, article links, and a message board.
http://www.gamestats.com/objects/014/014833/

GameZone
Review, preview, screenshots, cheats, and links.
http://ps2.gamezone.com/gamesell/p17271.htm

PlayStation.com: Ico
Official site of US/Canada release. [Requires Flash 5 and QuickTime 4.]
http://www.us.playstation.com/PS2/Games/ICO/OGS/