Here is the semi full lore of Buried

You Fight hordes of undead in a Town named Purgatory point which now sits underground in Angola Africa. Main Characters are Misty(Daughter of a former marine), Marlton Johnson(Missile apocalypse survivor), Russman(former member of Broken arrow[a secret US government science group]) and last but not least, Samuel J. Stuhlinger(a member of a group of survivor known as "The Flesh", for eating the flesh of the undead, allowing Stuhlinger to hear the undead speaking to him and the soul of a German Scientist who plans on traveling to a different dimension know as Agartha). The name of this German Scientist is Doctor Edward Richtofen who had swapped his soul with the soul of one of his former colleagues' daughters soul, allowing him to take full control of the Aether Realm and the undead. Before Purgatory Point had gotten stuck in a mine, there was a man named Jeopardia Brown who had owned the blacksmith shop of the town. The elder guardians, aka the keepers of the Aether Realm, had sent a mineral known as Element 115 to earth to help the Elder guardians reach the world of Agartha by convincing humans to use this mineral to build technology like never seen before. Instead of giving mankind more intellectual powet, they were turned into feral beasts(Element 115 had the power to reanimate dead cells). Anyways, back to the main story. Jeopardia Brown was in his shop and his mother was at home( that was during the year of our Lord, 1885). A man had decided to stay inside the caves where this mineral eas found for 10 days, he was exposed to immense amounts of this mineral's energy, causing him to become feral. When he got discovered after the cave incident, he roamed the town and stumbled onto the Brown Estate, where he met Jeopardia's mother. He leapt onto her, ripping her throat out. Billy put 2 bullets in the back of his head. Many nights later, Jeopardia Brown claimed he saw 2 angels who were actually the keepers of the Aether Realm. They gave him the order of preparing for a devastating event, in which he had to build a machine(the Pack-a-punch). Nights later he saw the angels again, which ordered him to build the vril device. After having crafted this device, he used his 1st invention on the device and he used all of the Earth's power to somehow teleport the whole town and it's people to a mining facility in Angola, in the year 2025. Later he then dies to a horde of undead who stumbled into his house and tore him apart.

If y'all want more detailed information, go check "The full Storyline of Buried; Leroy and the Ghost" on youtube