GHSI (Gee's Hidden Source Installer) is a program which installs a modified version of Hidden: Source along with it's dependencies (Source SDK Base 2006). The modifications:

• Optimized graphical settings for seeing the Hidden
• Optimized network settings for physkilling and other tricks involving props
• Includes many community maps
• cl_downloadfilter all (to (usually) prevent missing map error when joining a server which is running a map you don't have)

Run GHSI.exe

1. Place game_files.7z and source_sdk_base_2006.7z (link) in src directory
2. go build