| Quick Category Navigation
|| Creating, organizing and releasing your Source project.
| Level Design
|| Maps are the cornerstone of Source, where it all comes together. Learn about all aspects of producing them here.
|| Make Source's characters come to life with its uniquely powerful choreography technologies.
|| AI controls the behavior of all but the simplest of NPC actions and Source makes using or creating it easy.
| Material System
|| Textures and shaders are combined in Source to create materials.
| Sound System
|| Documentation on Source's software sound system.
|| Information about model creation for the Source Engine.
| Particle System
|| Documentation for using Source's particle editor and for adding particle effects to your mod.
|| Valve's proprietary GUI mimics Windows' and works both in-game and on the desktop. Used for HUDs, 3D cameras and more.
|| The nuts and bolts of any MOD, programming is what makes things different.
| Code Snippets
|| Bits of code that are useful but aren't enough for a tutorial.
|| Need help trying to use a particular Source feature? Check here.
|| Miscellaneous technical aspects about the Source engine and Half-Life 2 programming.
|| Explanations of common terms.
| Third Party Tools
|| Non-Valve developer tools.