Half-Life: Source - Mega PhysCannon Edition - Source SDK December 2004 C++ Source Code
This video will show you how to compile Source SDK December 2004 C++ Source Code.
Download link.
https://drive.google.com/uc?id=1ix3p6QFARQn8At94PW9NEQEmFovqHZsp&export=download
How To Install.
1.)Download "Half-Life Source 2004.rar" archive in provided above link.
2.)Once it finished downloading, open this "Half-Life Source 2004.rar" archive with WinRAR or similar program.
3.)Once you have opened "Half-Life Source 2004.rar" archive, you will see 2 folders: one named "C++", secondly named "Mod".
4.)"C++" is for those people, who would like to compile and change the source code. "Mod" is for those people, who would like just to play the mod.
5.)Just open "Mod" folder. You will see "Half-Life Source" folder.
6.)Extract it, for example, to your Desktop.
7.)You will see "Half-Life Source.exe" in "Half-Life Source" folder.
8.)Double left-click on it.
9.)Play.