Pick up the crowbar of research scientist Gordon Freeman, who finds himself on an alien-infested Earth being picked to the bone, its resources depleted, its populace dwindling. Freeman is thrust into the unenviable role of rescuing the world from the wrong he unleashed back at Black Mesa. And a lot of people, people he cares about, are counting on him.
You are Bob Sheriff Gub a soldier from the black mesa incident who is re-entering black mesa to stop combine from using it as a science lab
EASIEST WAY IS TO USE 7ZIP IT SUPPORTS ALL ZIP EXTRACTERS.
Right click on the mod file then click extract. The 7zip box (GUI) will open then click extract to your sourcemods folder. It will keep the folder intact and everytime you extract a mod it will see the sourcemods folder history, by clicking the arrow button down.