Internet gaming is to me what cigarette smoking (or just 'smoking') is to chain smokers: it's very hard to quit. -or- Internet games are to me what smoking is to chain smokers: it's very hard to quit. Referenced obtained from : http://www.grammarbook.com/punctuation/colons.asp (Rule 4)

Not quite. An Internet game is to me what a cigarette is to chain smokers, very hard to quit. Although 'quit' usually means to stop completely, so you quit smoking, rather than quit a cigarette. Perhaps 'resist' or 'avoid' would be better than 'quit'.