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Welcome to the Valve Developer Community. Whether you're building a "Triple-A" commercial project or a MOD for Half-Life® 2, you'll want to sign up as a Valve developer today.

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Valve Technology Source and the Source SDK Enter the Source Engine Documentation WIKI Our knowledgebase of technical information about using the engine and all of the related tools is now posted on a community-driven web site called a WIKI. Sign up as a developer to contribute or to ask a question. For MOD Teams Why choose the Source Engine for your MOD? Read "Making a MOD" - building a team through the shipping process. Already using the SDK? Check the FAQ for some helpful answers. New to Source coding? Get started with "My First Entity". Read (or add!) a tutorial on Source development, or any part of the content creation process.

Latest News Steam Beta Thu October 6th, 2005 We're going to run a short beta of the new look and feel to Steam, which we're building to accommodate more games and MODs on Steam. To run it, run Steam from a command line with -clientbeta betaui in your command line. If you find any bugs, please edit this page. Japanese Documentation Project Underway Thu September 1st, 2005 Although most of the existing documentation here on the VDC is in English, some users have started translating all of the documentation into Japanese. People who want to work on adding more langauges should feel free to do so. Source Engine AI Debugging Fri August 19th, 2005 Valve's Robin Walker has been fleshing out the AI section of the site. If you're doing any work with Source's AI system, reading through this category will save you a lot of time.