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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 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. Animation Documentation Fri August 19th, 2005 Jake Nicholson, also from Valve, has been working away at documenting how Source handles Choreography. Take a look at the Choreography category to get up to speed on how to make characters come to life in Source. VDC Mod Section Fri August 19th, 2005 A number of MOD teams have been using the Wiki as a way to educate people about their projects. Take a look at the Source MOD section to browse through a number of Source MODs that have been released or are currently in development.