Story Dark Earth is yet another game set in a post-apocalyptic future, but with something a bit more novel than a world war as its main plot. At some point not too far down the road, Earth is pulverized by a meteor shower caused by an asteroid that passed a little too close to it. All the cities and a great many people of the world are destroyed. Dust and debris thrown into the atmosphere block out the light. Days are cold and nights are colder.
People become generally ill-tempered.
However, there are some places where the sunlight reaches the Earth. Well, naturally it can't last. After playing the game for a short time, you find yourself caught in a massive conspiracy to kill the head of the Stallite's church. You succeed in saving the Sunseer Lori only to have the assassin infect you with quite a nasty little virus that will eventually turn you into a creature of unbridled evil. Needless to say, you need to do something about that.