The Hammer Editor
 Getting Started
 Connecting Areas
 Special Effects
 Game-Specific Articles
 Finishing Up
 Design Theory
 External Links
- Level Design Video Tutorials - A list of video tutorials related to Source mapping.
- Mapping Sites - sites about mapping, including tutorials, articles
- General Sites - Sites covering a wide variety of topics including mapping
- Map Archive Sites - sites where you can download maps for Valve's games
- File Hosting Sites - A list of reliable websites for hosting user created maps
- Image Hosting Sites - A list of reliable websites to share screenshots of user created maps
- News Site List - A list of websites for hype/advertisement and discussion
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