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!

• Nineteen 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