EarthFall

It's been 300 years since humanity has fled from the Ai that destroyed Earth with nuclear weapons.

Most of the humans that remain live underground, in the caverns of Mars.

A small band of specially chosen soldiers are given a mission to reclaim Earth, to see if it's fit for colonization.

They've trained their whole lives for this mission. Still, nothing in the cosmos could possibly prepare them for what they are about to unearth.