All is not well within the confines of the UAC, but what else is new. Hidden high atop a remote plateau, sinister machinations unfurl themselves inside this facility's walls. The demonic threat is present once again, but this time it seems that someone at the top was keeping fevered secrets well before their arrival. What price did they pay for progress? You'll have to procure your answers, and your equipment, on-site, but nothing should prove too elusive for a seasoned hellwalker like yourself. Leave no stone unturned, no evil unpurged, and dismantle the mechanisms behind this malleable intent.