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

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.

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.

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 Use it to: Build outdated files with the press of a button Eliminate the need to work with batch files Visually create script files, instead of typing them Create and compile an SMD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 [...]

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.

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.

Geek-Gaming is a French site that mainly seems to cover TF2, with the occaionsal review of Half-Life 2, EP1 and EP2 sp mods.

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

Planet Fortress is IGN’s portal for all things TF. It is more of a reference site than a regularly updated center.

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

Scrama – The Art Of Level Design is the portfolio of Scrama; a level designer from Russia.