About.com, Internet Games - http://internetgames.about.com/
Offers information, news and reviews of all kinds of online games. Also features message boards and newsletter.
MMOGInfo.Com - http://www.mmoginfo.com/
Offers information and reviews about mmorpg, playstation, xbox, PS3, PS2, gamecube, PSP, DS and GBA, and more.
MMORPGLIST.COM - http://www.freemmorpglist.com/
Features free MMORPG games listings.
Play.net - http://www.play.net/
Find a variety of adventure online multiplayer games.
The Online Gaming Network - http://theogn.com/
A directory and rating system of action, pet, sports, strategy and RPG games. Includes news, rankings, and player comments.