It's been over eight years since the Combine conquered Earth and appointed Dr. Wallace Breen as their liaison. Humans are now prisoners on their own planet. As a hidden resistance movement gathers strength in hopes of rising up against the Combine, the Vortigaunts have suddenly started preaching about the coming of a savior who will lead the resistance to victory. Their prophecy comes to light when a mysterious passenger suddenly finds himself on a train into City 17. After over eighteen long years, Gordon Freeman has finally returned.
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