Before the experiment begins, the G-Man can be seen arguing with a scientist in a locked, sound-proof room of the Research section of the Anomalous Materials Lab where only mumbling can be heard. He somehow manages to arrive at the Test Labs and Control Facilities before Freeman. The G-Man is first seen along the Sector C Line, standing in an electric tram frozen on the track opposite the tram that Freeman is traveling on during the Half-Life introduction sequence.
The G-Man congratulating Gordon Freeman in an elevator on Xen.
