Valve Community

Solid Surf is a site specific to the surfing aspect of CS:S, run by sintax error, and used mainly by the mapping studio solidsurf that he started.

TF2 Tactics contains downloads, exploits, tutorials, skill videos, tips & tricks and training information for TF2.

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

CommunityFortress.com is a fansite for Team Fortress 2. They provide coverage of competitive leagues and tournaments with a focus on personal interviews with the best in the TF2 community. In addition to their coverage, they host TF2 forums geared for the competitive player, a competitive TF2 wiki, and have community writers contributing TF2 predictions.

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.

Games Modding is a site that covers many aspects of making mods for various games. It features, tutorials, interviews and forums. Updated regularly, the crew of this site are working hard to provide interesting and original content.

Games Modding is also a PlanetPhillip.com file partner.

L4D Maps is a website completely dedicated to Left 4 Dead and everything about it.

HL2 DM University’s mission statement is to promote and improve the online Half-Life 2 Deathmatch experience for all players by providing an extensive repository of useful and interesting information and files.

Stu-Pidaso is a website aimed at Half-Life and everything related to it.

HL2World.com is a news and forum based site that has been around for a long time. The forum is particularly active.

3D Buzz is a company dedicated to providing the world with quality technical education over 3D animation, programming, game design, and much more. They have been producing training videos since 2001, always pushing the envelope in the development of informative lessons with an engaging and personable format. They try to make the viewer feel more like they’re involved in a classroom discussion with an energetic teacher as opposed to being stuck in a dry, uninspired, run-of-the-mill training video.

L4D.es is a website and Spanish Community dedicated to Left 4 Dead. Pagina web de Left 4 Dead en Español.