It was something terrible. The Resonance Cascade turned Black Mesa into a living hell. Aliens from the world of Xen destroy everything in this place. By some miracle, you successfully left the main complex and ended up in a giant warehouse quite far from the dangerous place. You are now safe. Or not?...

“Hiiii theeere...~”

A strange gentle but sinister voice broke the silence. In this darkness it is impossible to find the source. But one thing is certain: you are not alone here...