A mysterious fog descends upon the world, transforming it into a deadly landscape where survival hinges on more than just avoiding the undead. Players must navigate through obscured environments while managing the constant threat posed by the toxic haze itself, making environmental hazards just as lethal as any zombie encounter. The gas mask becomes an essential tool for staying alive, forcing survivors to scavenge for supplies and plan their movements carefully. With danger lurking both in the shambling hordes and the suffocating mist that chokes the land, every step forward demands vigilance and resourcefulness.