SteamCard is a simple way to display your stats from the Steam Community, just like a Live! Gamercard. SteamCards are just PNG images, which means you can embed them into forums, signatures etc. Different styles of SteamCard are avaliable so you can stand out from the crowd.

SteamPowered is the home of Steam, a digital distribution platform. The website offers visitors the ability to buy and download games, interactive with other Steam users.

The Survivors Diary Podcast is a weekly podcast about Left 4 Dead where we explore certain features of left 4 dead, as well as talk about community stuff that has been released. They also now cover maps that people have made as well as discuss tactics, suggestions and even glitches for the game. THey hope [...]

TF2 Maps is a community mapping site based around an active forum. It offers map downloads, tutorials, servers, developer blogs and user galleries.

TotalHL.hu is a Hungarian Half-Life portal.

Tweak Guides provides incredibly useful information and tips on how to get the most out of your hardware and games.

Whether you’re building a “Triple-A” commercial project or a mod for Half-Life® 2 , you’ll want to sign up as a Valve developer today.

This is the official home of Valve.

It might seem strange to add Wikipedia to this directory but it contain some very useful information for Valve’s fans. The sections on the games are very detailed. It is also available in many langauges.

World Of Level Design is a website/blog aimed at those interested in Environment Art and Game Level Design. It contains plenty of original content, including tutorials, articles and interviews. There is also a lively forum.

World Of Moo is a blog with a small group of writers. They blog about many aspects of gaming.