Underwater Research Facility, Abbreviated as U.R.F. We're part of the Black Mesa Research Facility, Located Far from the Base of Operation itself, The U.R.F. we're tasked to Research Marine-Life and Developed an Undersea Technology. It's rumored that the U.R.F. is located not far from Texas coastline. Only a selected few we're lucky enough to experienced what many could only dream of working there. On one fateful night, a Distress Call was sent from U.R.F. The Distress mentions that the base is Overrun and needed an Additional Reinforcement outside of the base.