Half Life 2: Dominion

Stalker Conversion Laboratory - A nightmarish facility where dissidents undergo irreversible transformation into Stalkers—cybernetic slaves stripped of humanity. The process begins with conscious vivisection on conveyor-mounted surgical tables, removing "unnecessary" organs and limbs. Subjects remain awake as their vocal cords are extracted and eyes replaced with synthetic receptors. The final stage implants control hardware directly into the brainstem, rendering them obedient maintenance units for hazardous Citadel operations. The laboratory's walls are soundproofed, though nearby Combine personnel report hearing muffled screams through the ventilation system. Fresh Stalkers are tested on obstacle courses before deployment.