Hazardous Enviornment Combat Unit Corpral Adrien Shepard as seen in the box art of a Gearbox expansion for a groundbreaking game made in 1998. Taking place after the events of the Black Mesa incident. Corpral Shepard and the squad he was assigned to cover up the Black Mesa incident. they now have to fight their way out to find an escape. While trying to escape Corpral Shepard has to go further and further into the facility in order to deactivate a nuke.