SMOD: Half-Life: Source - Opposing Force Monster's - C++ Source Code
Download link.
https://yadi.sk/d/ScIN0DvD4wD7pw
How To Install.
1.)Download "SMOD C++.rar" archive in provided above link.
2.)When it's finished downloading, open "SMOD C++.rar" archive with WinRAR or 7-Zip program.
3.)You will see three folders in this "SMOD C++.rar" archive - "ep1", "hl1_smod" and "Models".
4.)"ep1" - it's a source code, "hl1_smod" - it's a mod files and "Models" - it's a source code of models.
5.)Extract "hl1_smod" to your "sourcemods" directory, for example:
C:\Program Files\Steam\steamapps\sourcemods
6.)When the extracting process finished, install Source SDK Base 2006 from your Tools in Steam.
7.)Quit and restart Steam.
8.)You will see "SMOD: Half-Life: Source" in your Games List in Steam.
9.)Click on "PLAY" button.
10.)Enjoy!!!