Player Size Information. (Danial at Chatbear did some tests and put this together)
Demystify the Source SDK with this handy guide.
Make a simple mini mod without coding
How to use Pakrat
A tutorial on how to change the format of the menu. Be advised that this is not a tutorial one how to create graphics or art, but simply how to alter the menu format for your mod.
Basically a gathering together of ideas on how to make a map scary to the player.
Commons errors when working with Source
How to Install Maps
The purpose of this page is to answer most of the commonly asked questions about Scripting and problems related to Scripting.
Here's the list of other command-line parameters.
A mini tutorial on how to record in game action to produce a movie that will run in most media programmes.
This is basically a document that highlights all of the important changes from HL1 to HL2 mapping.