[cybernoodles]

I'm in my 30's now. I did the same exact thing, with the same completely whacked out sleep schedule, when I was transitioning 18-19. I spent thousands of hours on Oblivion. My parents did not get on my case about it. They did occasionally say "don't be late for X," or "you're going to miss Y," but they never blew it out of proportion to what it actually was, which was "just a phase" for me. I had very bad grades at this time, and gaming was a way to cope an escape; not the cause of it. My advice is to give him some space and let it play out. If he's going to fail something, let him fail and learn. Let him have a bad semester. He will bounce back. Perhaps this is unavoidable at this point.