Dark Trooper from Dark Forces video game.
It is a period of civil war. The Rebel Alliance struggles to free the galaxy from the clutches of the evil Galactic Empire. Discovering that Imperial forces have begun developing a new type of stormtrooper, the Rebels call on mercenary Kyle Katarn. His mission: seek out and destroy the secret Imperial project called Dark Trooper.
Known as phase III, this most powerful of the Dark Troopers is actually a figure known as General Mohc. Practically unstoppable, he represents the greatest threat to the success of the Rebel Alliance.