In their only appearance to date, a 3-man squad of them guns down a scientist running from the G-men, and later the Grunts are gunned down by the G-men for 'stealing their kills'. Two sentry turrets appear in the scenes following the opening sequence, and the G-men are shown to battle them. Their appearance in the episode named after them is short, however, their equipment have been seen before their appearance. They had sent several squads of them to try to finally silence the G-man Squad after their previous plan in Gordon Freeman failed (although Freeman is shown alive in several episodes later, which implies he is still alive and continues his ascent through Black Mesa and Highway 17). The Grunts were apparently part of an operation by the inter-dimensional bureaucrats Mr.Y, Mr.X, and Mr.Z.
