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.
Because it's always nice to test your sanity with a bit of an excruciating exercise. (Please read description.)
You may recognize this from a certain JollyWangcore, who burned his brain out on this rather intimidating modification...
Well, here it is again. Finally on ModDB with a fixed gameinfo.txt file for those who are too lazy to apply the fix themselves and wish to experience the mod in its raw form.
Just extract the "VeryHardMod" file to "sourcemods" in your Steam installation, restart Steam if necessary, and finally endure.