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Source SDK Documentation

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The Source SDK is freely available to all Steam users. It is used to develop mods and content for the Source 2006, 2007, 2013 and Team Fortress 2 engine branches.
About Source
Download and Installation
Distributing Source mods
Frequently Asked Questions
Release Notes

General

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Modding



Creating, organizing and releasing your Source project.

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Tutorials



Step-by-step guides on a variety of topics.

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Technical



In-depth discussion on the Source Engine's features.

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Glossary



Explanations for terms you may encounter.

Art

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Level Design



Maps are the 3D worlds where everything comes together.

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Modeling



Models are the detailed 3D objects that appear in the game world.

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Materials



Textures and shaders are combined in Source to create materials.

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Sounds



Quality audio adds a fourth dimension to your world.

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Particles



Effects like smoke, sparks, blood and fire are created with particles.

Code and Logic

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Programming



A mod's C++ code defines the way its world and game rules behave.

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Scripting



Scripting can be used for adding new functionality or logic to entities.

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I/O System



The I/O system is the backbone of most levels in Source-based games/mods.

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Artificial Intelligence



AI controls the behavior of all but the simplest of NPC actions.

Other

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Choreography



Direct your digital actors' performances with choreographed scenes.

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Official Tools



Official tools made by Valve for their games.

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Third-Party Tools



Useful developer tools created by the community.

Navigation

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