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Welcome to the Valve Developer Community

Whether you're building a triple-A commercial project or a modification for Half-Life 2, you'll want to sign up as a Valve developer today. It's free to join and is open to anyone working with the Source engine and its software development kit.

Sign up to become part of the community!

GoldSrc and the Half-Life SDK

If you want to create a Mod for Half-Life or looking for more GoldSrc documentation, visit the page by clicking on the button or the text above.

Source and the Source SDK

Our knowledge base of technical information about using the engine and all of the related tools is posted on a community-driven web site called a wiki. Sign up as a developer to contribute.

Source 2 Documentation

If you want to port Source content to Source 2 or looking for more Source 2 documentation, visit the page by clicking on the button or the text above.
Otherwise, you can check out the following Source 2 games with its Workshop Tools below:

Εργαλεία Εργαστηρίου Dota 2

SteamVR Workshop Tools

Εργαλεία Εργαστηρίου Half-Life: Alyx

Εργαλεία Εργαστηρίου Counter-Strike 2

The engine under the hood of Half-Life 2 can make your game a success. Let Source™ do the heavy lifting so that your team can focus on building great games.

If you're interested in building a product using Source or Source 2, talk to us about options for distribution on Steam.

Read about Valve Technology

For Mod Teams

Source Engine Features
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 Source SDK FAQ for some helpful answers.
New to Source coding? Get started with basic programming articles.
Read (or add) a tutorial on Source development, or any part of the content creation process.

New to the wiki?

For help with using the wiki, see Help: Contents. For help with navigating the wiki, see Category: Entry pages or Category: Valve Developer Community.

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