I've come to despise the word 'debunked.' It brooks no argument. If the debunker is wrong, what are you doing...re-bunking? Accept your Ignorance. The correct term is 'challenged,' or, rarely, 're-educated.'
Still, in my opinion, this list is pretty well definitive. It's written by someone who is the very opposite of a sensationalizing journalist. Similarly, he skillfully highlights the logical deficiencies of the scientists producing many studies.
The link I found it at is pretty much a linkjack, but does say,
"Video games, like any other form of media, can only trigger the desire for violence already lying dormant in an emotionally disturbed child. They cannot “corrupt” someone who is mentally stable and understands that there is a distinct difference between fact and fiction."