In a ravaged future, humanity has discovered an alien pathogen on Mars capable of generating TOX-Z—a toxin that, when combined with certain minerals, produces a source of energy more powerful than nuclear power. However, this discovery unleashes a catastrophe: the ambition to control this energy drives governments to allow the spread of the pathogen, turning people into destruction-thirsty zombies.

Now, the world has plunged into chaos. As a player, you must survive in a hostile environment, facing relentless hordes and uncovering the dark secrets behind the spread of TOX-Z. Your fight will not only be for survival, but for control of the most powerful and dangerous energy source ever known.