Half-Life: Duality

After the alien invasion at the Black Mesa Research Facility, the world was suddenly settled by the multidimensional alien empire known as the Combine, turning Earth into one of its many vassal states. Thirteen years since escaping the wretched facility, Barney Calhoun finds himself as a citizen of this new Earth, living the rest of his remaining days in silence and loneliness deep within the Combine Pacific Division's base of operations, City 8. But after coming face to face with the traumas of his partially forgotten past, a new goal now lied ahead of him in Camp Haven and its young mysterious leader - Miko.