Half Life 2: Dominion

Combine Workers' Hub. Adjacent to the towering Citadel, this grim facility houses the Engineer Core—non-combat personnel tasked with maintaining Combine tech and infrastructure. Surrounded by scaffolding, exposed piping, and ever-humming relay towers, the Hub operates day and night. Workers in dirt-streaked green coveralls and respirator masks move in and out, welding, calibrating, or hauling equipment. The building itself is a squat, reinforced structure of blackened metal, pulsing faintly with blue energy. Security is tight, with scanner drones and CP overseers ensuring "efficiency" at all times. Unauthorized entry is met with lethal force.