I've noticed the G-Man walking around in various areas in HL2 and the episodes…always just outside of the normal camera range unless if you really look at him.
I realize that this is just a bit of cinematic flair and Valve is playing around here a bit, but I'm curious…is there any way to interact with him? Shoot or kill him even?
I'm currently about halfway through Episode 2 and just noticed him walking on a far-off catwalk. I didn't have access to a weapon at that point but it kind of made me wonder.
Best Answer
No, he is never close enough to harm. He is immune to being shot, even if you reach him via noclip or other means.
Source (including list of locations)