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

Black Mesa is a third-party total conversion modification for Half-Life 2 and a remake from the 1998 video game Half-Life. The ultimate goal of the mod is to recreate the original Half-Life from the ground up, using the advanced capabilities of the Source engine to create a new and more engrossing in-game world.

Can You Run It? provides a one-click solution that looks at your computer’s hardware and system software to determine whether or not your current system can run a product.

City 17 is a Russian review site for single player maps and mods.

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.

Counter-Strike Brasil: Um dos maiores portais de Counter-Strike do Brasil, conteúdo, informação, interatividade, palavras que sempre andam junto com a competência e comprometimento em ajudar o próximo.

Creative Mapping is a Dutch mapping community.

Having been around for nearly nine years, CS-Nation continues to be the leader in providing Counter-Strike related news to the community. Gamers from all over the world can learn about the latest updates to Counter-Strike 1.6, Counter-Strike: Source, Condition Zero, and all future sequels in the series.

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 Use it to: Build outdated files with the press of a button Eliminate the need to work with batch files Visually create script files, instead of typing them Create and compile an SMD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

Edit Life is a developer resource focusing on map creation for the source engine. The site hosts tutorials and detailed entity lists, error solutions, and soundscape information.

Empires is a multiplayer Half-Life 2 mod combining first person shooter and real-time strategy.