My 18-year-old is a gaming addict. Most of his friends are gamers. It makes me sad because I don't think he's living as full of a life as he can; no girlfriend, and while I'm glad he's not getting into drinking and drugs, he never goes to parties; he just never seems to be having lots of fun. He's very nice, does the minimum to pass at school, in his last year. Not sure what he wants to take at college -- or if he wants to go right away.
Is taking his systems away the only answer?
Welcome colinb! Speaking from experience, I would advise you not to even consider sending a gaming addict away to college. Total waste of money. If this is his last semester, start talking to him now about his plans for the future. He is 18. You are no longer obligated to support him. When he graduates, he needs to be prepared to live in a game-free house and work or go to community college (or both), or move out, support himself, and continue to game (if he can afford it). You have no control over what he does after he turns 18, but you don't have to support his choices financially, and you DO have control over what happens in your house. It's up to you.
"Small service is true service while it lasts. Of humblest friends, bright creature! scorn not one
The daisy, by the shadow that it casts,
Protects the lingering dewdrop from the sun." -------William Wordsworth