<p>I don't know exactly what to tell you, but at this point -- he has to be the one to make the decision. Not you or your parents. The best thing that your parents can do is to turn off the cable and internet access and get rid of the TV and video games. They are clearly allowing him to escape reality. As long as your parents enable him, the behavior will continue. This also goes for the personal cleanliness. Set the ground rules for the house -- and if he doesn't like them, he can go elsewhere.</p>
<p>Personally, I would insist that he get a full time job and study to pass the GED. I would give him a time limit to accomplish this.</p>
<p>Has he considered joining the military? That is another option I would recommend he explore.</p>
<p>He is an adult who is being allowed to spend his day as he wants, without needing to worry about studying, working, paying rent, showering or anything else. I cannot imagine that without a serious wake-up call, he will change.</p>
<p>Good luck!</p>