Adrian Shepard

Corporal Adrian Shephard is a 22-year old US Marine Corporal assigned to the Hazardous Environment Combat Unit from the Santego Military Base, Arizona, where he was trained by Drill Instructors Dwight T. Barnes and Sharpe, and the protagonist of Half-Life: Opposing Force.

He is one of the men sent to the Black Mesa Research Facility to kill the Xen invaders and later silence the witnesses, especially a scientist named Gordon Freeman, as part of a classified mission. Early in the game, Shephard finds himself separated from his unit and ends up fighting solely for his life, aided by fellow Marines scattered around the facility and Black Mesa employees.

Game Personality
Corporal Adrian Shephard is a soldier of the Hazardous Environment Combat Unit, (H.E.C.U.) sent to silence the Black Mesa Research Facility. However his Osprey is shot down and finds that he is the sole survivor of his squad. With his sergeant dying before he could give orders, Shepherd does not know the real reason he was sent to the facility and now attempts to help the Black Mesa employees, and fellow soldiers alike, escape from Black Mesa, encountering Xen aliens, Race X aliens, and Black Ops soldiers.

Series Personality
Not much is known about the series version of Adrian Shepard, other than he gets angry fairly quickly, and he doesn't like scientists.