The High Definition version uses the updated weapon models. They appear to be using the updated Submachine Gun model from Opposing Force. The Robot Grunts were updated for Blue Shift. He worked at Valve in collaboration with Cendant Ireland and Sierra Studios during the months of October through September as a freelance artist and created concept drawings and the character models for the German version of the game.
The robot model was created by Andrew Phelan. The Robot Grunts are referred to as Androids in the instruction manual for the German version of the game. A player model version of the robot is also featured in the multiplayer portion of Half-Life which defaults to an orange and red color scheme. Their limbs are connected by mechanical hinge joints. Robot Grunts appear as armored bipedal humanoid robots with a dark green camouflage pattern covering their body and a single red eye offset to the left side of their head.