Raymond Park is a British actor, stuntman and martial artist, best known for his playing the physical part of Darth Maul in Star Wars Episode I: The Phantom Menace, Toad in X-Men, Snake-Eyes in G.I. Joe: The Rise of Cobra, and Edgar on Heroes.
(Casting mostly with Half-Life 2 and its episodes in mind.)
After accidentally causing an inter-dimensional alien invasion from an experiment gone wrong at the Black Mesa Research Facility, Gordon Freeman fights to clean up and stop the resulting catastrophe all while evading a military cover up. Afterwards he is approached by a mysterious man with supernatural powers and "employed" under him, getting sent 20 years into the future to fight with his former colleagues against another worse alien empire, the Combine.