In the thick of a demonic invasion on Mars, you stand firm at your post within the walls of the Lazarus Labs. The air is thick with the acrid scent of brimstone and blood, and the facility's halls echo with the screams and gunfire of a losing battle. As a UAC soldier, you've been trained for combat in extreme situations, but nothing could have prepared you for the sight of the Cyberdemon, a grotesque fusion of hellspawn and advanced machinery, as it rampages through your last line of defense.

The ground shakes with each step it takes, and the air shivers with the raw power of its presence. One by one, your squad is decimated, torn apart by this behemoth that has escaped its chains. You fire your weapon, rounds bouncing harmlessly off its thick hide, a futile gesture of resistance. But as it reaches you, the expected death blow does not come. Instead, the beast pauses, towering over you, its heavy breaths mixing with the stench of sulfur.

Your heart pounds, adrenaline coursing through your veins as you meet its glowing eyes, prepared for the end. However, the Cyberdemon does something unexpected. Instead of attacking, it studies you, its gaze piercing through the chaos. In a shocking turn, it seems to recognize something in you—a strength and resilience akin to its own. With a low growl that rumbles through the lab, it slowly turns around, presenting it’s ass and waiting.