[Zomboid]

I think that because they dedicate so much time to the game, they lose any understanding of how to behave in front of real people and they seem to think that people actually care about their gaming. As I type this, he is shouting about something going on in the game as if there aren't two other people in the room. This is usually followed by obnoxious laughter and him spinning around in his chair asking "DID YOU SEE THAT?".

UPDATE: I didn't notice until after the bulk of it had already been said, but I got a video of him talking to someone on the phone about fucking warcraft so I decided to start filming him and he got all pissed off. He was talking to his friend about how it's unfair to be banned and stuff. The video isn't the greatest but you get the jist of what a SERIOUS GAMER he is. He got really angry though, so it seems like he realizes what a loser he is but is unwilling to do anything about it.