Metro: Last Light is a first person shooter set in the Russian metro system underneath Moscow. Sound a little odd? Well this sequel to Metro 2033 takes place after a nuclear war that devastates humanity, and the only surviving humans split into factions that now occupy different sections of the Russian underground. Fighting other survivors in the tunnels, mutants on the surface, and whatever you find in between seems to be common place in this post-apocalyptic setting.
Take a look for yourself at the “Ranger Survival Guide”:
It’s bound to be tough to survival in an environment as inhospitable as the likes of that, but I imagine it will be an effort well enjoyed. This looks like the kind of game to do the first person shooter genre proud.