Links

GOG.com
Good Old Games, a place that offers a growing catalogue of older games for really good prices. All titles are guaranteed to work on Windows XP and Vista and are 100% DRM-free.
Quake Live
Quake III Arena that you can play for free in your web browser. Proof that id is still the king of games.
Abandonia
Hundreds of old DOS games, many of which are available for download if they're not currently protected by the ESA. Other than that, there's a lot of content to enjoy as you stroll down memory lane or perhaps experience some great, old games for the very first time.
Abandonia Reloaded
Like original flavour Abandonia, but with retro remakes and freeware games. In a lot of cases, like those of Soldat and Yahtzee's 5 Days a Stranger, freeware can be even better than the "real thing."
X-Entertainment
A site after my own heart, with a lot of geek- and '80s-related content. If you enjoy the type of content you find at 34D, definitely take the time to check out X-E.
Retro Junk
User created content coming out the wazoo. If you have any fond memories of days past and want to write about it for the world to see, try submitting your junk here.
Game Spite
1UP.com author Jeremy Parish's little home on the Web where he writes about games 'n' junk.
GameSetWatch
Sophisticated discussion on all those vidya gamz.
Rathergood
Fun music and videos that almost the whole family can enjoy.
IndieGames.com
A site covering games that are made by people who actually like making games.