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

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

Planet Half-Life is the daddy of them all. It’s been online longer than most and is generally updated daily.

SLUM is Czech Steam community and fan portal about Steam and Valve games.

Steambans.com is a global banlist/watchlist made for the Steam technology from Valve. All bans that are accepted will enter a database which then is used to protect all servers under their supervision.

Steam Friends covers all the news related to Steam and Valve.

Steam Community and News Portal

SteamPowered is the home of Steam, a digital distribution platform. The website offers visitors the ability to buy and download games, interactive with other Steam users.

Team Fortress HQ provides the latest news, articles, skins, maps, sprites, and everything else Team Fortress you can imagine.

TF Portal.Net is a joint English and German website cover all the Team Fortress games.

The source for keeping Team Fortress Classic alive!

The Snarkpit has been online since 2001, making it one of the longest running websites that covers Valve’s games. It has had a number of redesigns over the years and always adds new features.