Flickering out is set in a universe where it is 100 years into a zombie apocalypse. There are less zombies (or Terra) than before.
Humans have built up bases and have invented muskets and revolvers. Most wars are fought between humans and humans or humans and elves. Elves are evil (except for fire elves which are extinct except for one). There are three main land masses, Elowar, Bai, and Honeycombe.