Buy Games Online

CyAlchemy Gaming
Chips and Bits Online Game Superstore

Online Multiplayer Sites

Pop Cap : Some fun java games! Single and multiplayer games.
Pogo : Live multiplayer games...win money!!! Classics like Backgammon, arcade games, and casino games like Keno or Poker.
Guess-A-Sketch: Live multiplayer game! This one is a cross between Pictionary and Etch-a-Sketch. Check it out!
MPlayer: One of my favorite sites. Play a huge number of live games, including Quake, Mech Warrior, Spades, etc... most of them are free! Voice chat support. Ratings available.
Playsite: Free site; Backgammon; Euchre, Spades, Tangleword, and much more. Ratings available.

Gaming Help, Codes, and "Cheats"

Universal Hint: Interesting, unique system to help you solve dozens of computer games without cheats

Cheat Code Central: Codes and Cheats for a large variety of games

Gamer's Choice: Maps, codes, and help

Xtreme Gaming: Cheats and info for PC, Nintendo, Sega, and other game systems

Game Review Sites

GameSpot : extensive site with reviews, articles and more
Yahoo Review: Reviews of 200 games
VideoGames.com:Nicely laid out site with gaming news and reviews
Computer Games Online:Very well done, complete, and comprehensive guide to video and PC gaming. Help, Reviews, Previews, and more.
ZDnet Awards:Best Shareware Games
Gamer's Zone:Gaming reviews, downloads, articles, more
Hot Games:Review of Game Demos and more