Black Mesa

You are Gordon Freeman, a theoretical physicist at the Black Mesa Research Facility. When a routine experiment goes horribly wrong, you must fight your way through an interdimensional alien invasion, and a bloodthirsty military clean-up crew in order to save the science team... and the world!.  Superliminal Features: A completely reimagined and refined single player campaign, including all new and expanded Xen levels 19 chapters of fighting through top-secret labs, running atop harsh desert landscapes, sneaking into abandoned railways, and leaping across dimensions Mind-Blowing graphics and effects, never before seen on the Source Engine Face off against an army of classic enemies, updated with new features and engaging AI Wield an arsenal of military hardware, scientific prototypes, and the iconic crowbar through incredibly detailed environments The all-new soundtrack and voice acting create a more immersive experience than ever before 50 Fun and challenging achievements