Dark Energy
The sounds of live ammo exiting the muzzle were like music to our ears coupled with the constant roars and hissing of hideous creatures that we encountered along the corridors. Masal and I alternated from front to back every few paces while the scientist shook like a weak twig on a gale. He had seen first hand what their creations could do if they gained access to the surface.
The battles that ensued were fierce and unforgiving, each step forward accompanied by the clash of weapons and the unleashing of newfound powers. We encountered more of the twisted creatures that plagued the facility, each one more than the last.