The Underground was dark, barely lit by the flickering, dim lights. It reeked of oil. Countless computer screens lit up, some with errors, others with log in screens. Faint glitchy music played in the background. It didn't really bring much comfort compared to the dark, background of the Underground entrance of the labs.

Distant screeches and calls came from an unknown predator.. or predators.. whatever lurked in this place wasn't friendly. Drones were dead and feasted on. Their bodies left there, oil dried up and not of any use. The cameras still looked.. functional?.. Y/N always had the feeling someone was watching them.

Y/N turned their gaze over to what seemed to be a dinosaur looking drone thing? It's intensely bright blue eyes stared back. They realized it was a Sentinel. Those things that killed the worker drones. Luckily, It didn't try to paralyze Y/N with the flash of its camera on its head. Instead it tilted it's head at them, chirping curiously.