HL Fusion is a French language site, thatt covers everything related to Half-Life.

HL Improvement is dedicated to the creation of custom content for all things Valve related. With tons of custom content, and a friendly community. What could go wrong?

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.

HalfeR is a Russian fan-site, specialized on Half-Life, Half-Life 2, Episodes, addons like Blue Shift, Opposing Force and huge modifications like Black Mesa: Source and so on. The site contains news, previews, reviews, interviews, screenshots, patches, etc. fixes about the games.

Halflife2.net features information about all Valve titles, as well as the largest Valve forum community outside of Steam. It is a good resource for news and general information about the games, and the community can answer most Half-Life related question. The site is hosted and supported by Valve themselves.

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

Half-Life Portal is the biggest German website for Half-Life games, mods and other games from Valve. This web-portal has a community with forums, many news, articles, downloads and informations regarding most of Valve’s games, as well as Steam and third-party Source Engine games.

HL Site is a Russian portal for some of Valve’s games.

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.

Interlopers has been online since 2004. It posts selected Steam game news but its focus is on content creation.

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 [...]

Mod DB is the largest website dedicated to supporting independent development of games