
 Originally Posted by 
Zekk_T_Strife
					
				 
				An intervention is a system where you get together everyone that cares about him as well as everyone he cares a great deal about.  You lock him in and do not let him leave until things are resolved.  This is definitely not work at his own place unless you de-boxxed the area.  The main issue is he cannot escape, interventions are used as a last ditch effort to let someone know what they're doing to hurt others.
Once you've rallied these people, inprisoned the silly douche, and cut off his escape to the xbox then you must confront him.  Have everyone go in turn and say exactly what he's done to hurt them and the extent to how they have been hurt.  You should definitely be there with some of the things you've told us here.  Also an ultimatum must inevitably come from this.  Something to the degree of stopping playing his xbox or everyone here will leave him.  Something that'll really snap him into reality.
I'm not a pro at this and haven't actually been a part of one, but there are many professionals who organize these things.  I'd suggest googling it and reading up on exactly how it's done.  Best of luck with it though.