Is it ever explained who this guy is?
I noticed that in the 3rd level there's a part where you go to and a message appears with his face, saying something like "Good, you have found my house, come in!". How do you come in?
EDIT: Now I think that line was just a prank by some guys who made a patch for the game.
I'm a noob, and I haven't completed all the missions.
Sorry if this was discussed before, I looked it up but couldn't find anything about this guy.