The mod i am making is a Half Life 2, Singleplayer, Horror mod
Here is the summary:
Following the events of a major earthquake, Daniel finds himself lying face down in the dirt, lost and alone in some sort of underground cavern. Scrambling to his feet he looks around his dark surroundings for a sign, a light, anything to get his bearings. Something stirs in the back of his mind and some nightmarish memory comes flooding back. People screaming, flames and billowing smoke reaching high into the sky, the thunder of military firepower. Had he blacked out? Coming to his senses, something in the gloom catches his eye, and slowly, he makes his way deeper into the cave.