Blender Source Tools is an extension for Blender that enables you to work with Source engine models and export them to formats that are compatible with the Source engine.
This extension enables you to make mods for games developed on Source.
- Download raw-format of latest version of BST from this GitHub-repo
- Open Blender
- Find Add-ons in this path: Edit > Prefernces > Add-ons
- Press button "Install an add-on"
- Choose zip-file of BST and press "Install Add-on from File"
- Enable BST and it's all. Enjoy :)