Valve Community

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

DuctTape is a development integration and project building tool for Source Engine modders. Use it to:

• Build outdated files with the press of a button
• Eliminate the need to work with batch files
• Visually create script files, instead of typing them
• Create and compile an SMD into an MDL
• Build soundscape files using an intuitive interface

Sammy Servers lists servers to play Zombie Master and a few other mods and games.

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

TF2 Forum is the center for discussion, game strategy, and resources for Team Fortress 2. You can chat with the community, or take a look at their information sections.

TotalHL.hu is a Hungarian Half-Life portal.

Mods Online is a news and community forum, with a very active user base.

Combine Destiny is the home of the Combine Destiny 1 and 2 mods for Half-Life 2.

The Cinematic Mod (CM) is a Half-Life 2 modification, that adds more details and a darker look to the original Half-Life 2 series.

Gamasutra is a fantastic site for game developers. It covers industry news and lots of interviews and features. The site requires registration but it’s free.

The Combine Overwiki is a wiki encyclopedia dedicated to the Half-Life universe and its related subjects. Its main purpose is to treat the available content in an intelligent and analytical way, with emphasis on behind-the-scenes material when available.

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.