Penumbra: Overture -

: Philip eventually learns that the mine is just the outer layer of a larger, more mysterious facility known as "The Shelter".

: The mines are infested with mutated, oversized dogs and spiders that have been affected by a psychoactive toxin. He must also evade massive annelids, or rock worms , that tunnel through the earth. Penumbra: Overture

Upon arriving in the frozen wastes in the year 2001, Philip is forced by a violent storm to take shelter in an abandoned mine. As he enters, the entrance collapses, trapping him and forcing him deeper into the dark, subterranean tunnels. : Philip eventually learns that the mine is