Extracting image assets from game client

Steps

1. Download GCFScape (msi or zip) from here.
2. Using GCFScape, load the .vpk file from the game client you'd like to extract from. (Typically pak01_dir.vpk)
3. Download latest Valve Resource Viewer from here.
4. Image files within .vpk files are stored as .vtex_c files. Extract the ones you want using GCFScape to a directory of your choice.
5. Open the vtex_c files in Valve Resource Viewer, and export them as .PNG files