The Eternal March is a narrative-driven stealth puzzle game, played from fixed camera angles. Its world is ravaged by murderously hot days, forcing all of humanity to keep migrating, following the Night.

We follow three nomads: Atlàr, an amateur cartographer; the pregnant stilt-walker Marzuta; and Ptole, a mysterious swindler. Together they search for another way across the ocean. But we don't see their story through their eyes. We see it through the eyes of the small creature following them: a newborn colossus, of a species long thought extinct.

Atlàr stole an egg from her nest. Inside is her unborn brother, and she will do anything to save him. In this harsh world, humans see her kind as a delicacy.