Stage 1

Open the source SDK and Create anew mod.

You can choose between the first three options

• modify HL2 Single player
• modify HL2 Multiplayer
• Multiplayer mod from template

Stage 2

1. The first path is the place where the mod Source file will be stored
this directory contains

• mapsrc
• materialsrc
• modelsrc

This path can be what you want ( ex : c:/mymod/ ).

Note : This directory must not have a gameinfo.txt at his root.

2. the second string field to fill is the Name of your Mod project, as a directory in steamapps/sourceMods/ will be created with the name you choose.
note : prevent to add space and exotic characters.

This is the directory of the final mod, the one you will launch from steam to run your Mod.
And it contains :

• maps
• models
• materials
• gameinfo.txt