Since 2004 I've taught myself, and others, in just about every discipline the Source engine offers.
How to modify the various file types used by Dirt 3. This page can be edited by anyone, so please add any new formats you encounter.
Find all Alien Swarm documentation at the Valve Developer Community.
There are a few special steps that need to be taken...
How to get started with modding Braid, including accessing the editor and launching custom universes.
Find official tutorials at the official WinterMute Wiki.
Texturing, modelling and animation tutorials now available!