Valve Community

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.

Modifikace is a Czech news and review site for single player Half-Life 1.

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

My Aperture Labs: Welcome to the Aperture Science Enrichment Center’s Online Community Networking Web Service (or ASECOCNWS for short). Here at the ASECOCNWS, test subjects may attempt to solve Portal puzzles, build their own Portal puzzle environments, or simply talk about cake.

Ten Four is a well known single player review site that covers a few different games. They present 3 levels of awards for the better releases and the forum, whilst not as busy as they used to be, is still a place to find the latest releases.

TF2Portal.es is a spanish website focused on Team Fortress 2. Some of the contents are: news, downloads, tutorials, forums and a public server.
TF2Portal.es es una web en español dedicada por completo a Team Fortress 2. Algunos de sus contenidos son: noticias, descargas, tutoriales, foros, y un servidor público.

Leak Free is a Source engine development community started in 2004, which consists of useful tutorials and a helpful community to answer all of your level design, modeling, and programming questions. One of the most noted features is the Valve Hammer Editor Error Listing, which describes all the errors in the software and how you can avoid them.

HL2Spain is a Spanish fan-site and gaming community covering everything about the Steam Platform, Valve Games, and Source Engine based Games & MODs. It includes news, reviews, previews, manuals and tutorials done by their team and the community itself.

Half Life Storm contains forums for discussions about the Half Life Series and the other Source Engine games by Valve. It is mainly directed towards mapping, as it contains many mapping tutorials. It will expand into other categories later on.

Half-Life Inside is a HL community for Russian speaking fans.

Headcrab.pl is a Polish website that covers most of Valve’s newer games.

Game Updates is a bittorrent reference site for legal game and mod files. You can find and download the latest patches and updates. The site is updated very regularly and users can also upload files. Each file has a basic description and users can comment on each file. There is also a forum.