KHGuides.com
- A complete walkthrough of the Kingdom Hearts Series by Keith Haymond with screenshots and music along the way. Bosses, Treasure, Secrets, and Weapons. Also includes official music and trailers.
- http://www.KHGuides.com/

GameFAQs
- a list of several dozen text guides, FAQs and walkthroughs for the game, in both English and Japanese.
- http://www.gamefaqs.com/console/ps2/game/516587.html

RPG Dreamer
- Game review, pictures, character profiles, music, walkthrough, hints, and forums.
- http://www.rpgdreamer.com/kh/

RPGamer
- News articles, screenshots, movies, box covers, propaganda materials, artwork, and wallpaper.
- http://www.rpgamer.com/games/other/ps2/kinghearts/kinghearts.html

Unlimited Gamer
- Walkthrough, sidequest information, videos, and images.
- http://unlimitedgamer.net/kh.php

Kingdom Hearts International
- The international portal for the official site. This site offers a different layout from kingdomhearts.com, as well as the same site in other languages.
- http://www.kingdom-hearts.com

Kingdom Hearts
- Square Enix's official website with news, game information, storyline, world descriptions, character profiles, battle system, features, and trailers.
- http://na.square-enix.com/games/kingdomhearts/index1.html

KH Hybrid
- Game strategies, secrets, guides, and lists.
- http://www.squarehybrid.com/index.php/Kingdom_Hearts/Index/

IGN
- Previews, screenshots, and news articles. IGN Insider subscription provides access to exclusive articles, game videos, travelogues, and the game forum.
- http://ps2.ign.com/objects/016/016467.html

GameSpot
- Previews, news articles, screenshots, and video clips.
- http://www.gamespot.com/ps2/adventure/kingdomhearts/

Final Fantasy Net
- Provides character biographies, Ansem Reports, summons, weapons, and item lists.
- http://www.ffnet.org/square-enix/kingdom-hearts/

Final Fantasy Insider
- Contains walkthrough, characters profiles, equipment list, images and wallpapers.
- http://www.ffinsider.net/kh/

Development Staff Dossier
- RPGFan's profiles on the game's development staff with photographs.
- http://www.rpgfan.com/features/kh/index.html

The Door to the Light
- MP3 files of Disc 1 of the soundtrack, and part of Disc 2.
- http://khmp3.star-traveler.com/

CCG: Kingdom Hearts Cheats
- Contains a list of unlockables and hints.
- http://www.cheatscodesguides.com/playstation-2-cheats/kingdom-hearts/

BellaOnline Walkthrough
- A walkthrough, including list of trinity spots, Dalmatian puppy locations, and battle descriptions.
- http://www.bellaonline.com/gaming/strategy_lib_khwalk.html

Heroes of Gaming
- A review, screenshots and cheats.
- http://www.heroesofgaming.com/games/ps2/k/kingdom_hrts/index.htm