The Source engine is a 3D game engine developed by Valve Corporation. Its unique features include a large degree of modularity and flexibility, an artist-driven, shader-based renderer, accurate lip sync and facial expression technology, and a powerful, efficient and completely network-enabled physics system.
Just follow through these three videos, and you will have a mod that you are able to add custom code into. Since I was tired of looking for video tut's for coding in source engine when I started coding, I now decided to make tut's for new people to modding in source :3
Posted by Stektpotet on Nov 25th, 2011
Basic Starting a mod.
Hope you enjoy :D