RPGPlanet: one planet, many worlds.
IGN.com: game reviews, screenshots, media, hints, forums, etc.
Gamespot: your one stop for information about both PC and console games, including reviews, FAQs, videos, screenshots, and so much more!
The Hand Vs Eye: a database of mind-bogglingly good gameplay.
The Bartle Test: what's your gaming style? (only applicable to RPGs)
Wizards of the Coast (Official Site): get all your WotC info right here!
Dungeons & Dragons (Official Site): the first and still the best.
Candlekeep: large site with information, resources, and articles about the Forgotten Realms D&D setting. On-site music!
The Grey Company: information about D&D elves. Optional on site music!
The UnderDark: information concerning the D&D Underdark.
Devil May Cry (Official Site): the latest news on games starring everyone's favorite loudmouth half-demon Dante.
Devil's Lair: the biggest fan database of Devil May Cry 3 media I have ever seen, pure heaven!!
Devil Child: a nice Devil May Cry site with extensive doujinshi reviews.
Devil May Cry Yaoi Walkthrough: you will never look at DMC1 the same way again...
Devil May Cry: A Primer: a highly amusing introduction to the history and characters of the game.
Baldur's Gate 2: my favorite game of all time! =D
The Darkest Day: an unofficial, downloadable BG2 mod of an additional 30 hours of gameplay!
Mud Master: makers of the Shadow Keeper, the Gate Keeper, and the Dale Keeper.
Kirith: a page with many great portraits you can use in Baldur's Gate games.
Oregon Trail: very old-school, very pixilated, very fun in my humble opinion. The best part is naming everyone in your party after people you know and seeing which of them die and how! :P
The Elder Scrolls - Morrowind (Official Site): can't argue with a game that lets you change everything about it.
Morrowind Summit: big site of information about and mods of Morrowind.
Morrowind Source: a vast library of fan-submitted mods for Morrowind.
Tamriel Rebuilt: a monumental effort by fans to rebuild the world of Tamriel in all its glory using the Morrowind editor.
Guard Impact: worldwide SoulCalibur community.
SoulCalibur 2 (Official Site): my favorite fighting game of all time, tied with Mortal Kombat.
Mortal Kombat: Deception (Official Site): my favorite fighting game of all time, tied with SoulCalibur.
MMORPG.COM: the latest news, screenshots, ratings, and much more of upcoming and existing Massive Multiplayer Online Role Playing Games!
World of Warcraft (Official Site): absolutely AWESOME!!!
Thottbot: World of Warcraft Database: a kind of search engine for all things World of Warcraft.l (Official Site): the one I'm waiting for!!!
City of Heroes (Official Site): a very fun and fast-paced game if you like dabbling in superpowers! The customizeability for both physical appearance and skills here is simply astounding!
Paragon City: a very well-designed and accessible site that is a great introduction to the City of Heroes game.
Dark Age of Camelot (Official Site): I hugged a DAoC dev... TWICE!!
Neverwinter Nights (Official Site): a game set in the Forgotten Realms D&D world, which allows you to play multi-player and create campaigns.
EverQuest (Official Site): otherwise known as EverCrack... Stay away if you value your life!
Horizons (Official Site): no PvP here, move along...
Shadowbane (Official Site): such a great game, so many things gone wrong ;_;