Amphibian Mods describes procedures for installing and running single player mods for popular first person shooter games. The site is also a showcase for quality mods and map packs

Foxhole is the spiritual home of many Hangar16s. The site offers active and mature forums, coupled with in-depth articles and reviews about most aspect of FPS gaming.

FPS Banana is one of the largest and most popular game customization community driven websites around, uniting talented artist from around the world in constant submission of custom created content for the games of today.

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.

Grinder74 covers single player maps & mods & other addons for the Half-Life series of games. It’s in Polish.

Half-Life Creations provides a professional atmosphere for third party developers. Forums, downloads and even hosting for modifications are availble on this friendly site.

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.

HL2Mods is a simple and easy to use directory of mods for Half-Life 2. It covers Episode One and Two but doesn’t make a distinction.

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

Map-Factory is a database hosting custom maps for any FPS. If you’ve make a map or simply came across a good map, feel free to submit it! If not, then just navigate through the site and you’ll find a lot of good maps!

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