Complex sentence: The game takes place in an underwater research facility called PATHOS-2, some time after the surface of the earth was devastated by meteor collisions, where the last human scientists survive on a day to day basis, fighting off their isolation.
Split into simpler sentences: The game takes place in an underwater research facility called PATHOS-2, some time after the surface of the earth was devastated by meteor collisions. Where the last human scientists survive on a day to day basis, fighting off their isolation.