Cause Of Death: Gunshot
Game/console Responsible: Halo 3

Another case that has less to do with being hamstrung by addiction and more to do with being damaged goods and having easy access to firearms. In 2007, seventeen-year-old Daniel Petric couldn't deal with getting his copy of Halo 3 taken away, and instead of just sucking it up and being miserable like all 17-year-olds, he lost his goddamn mind.

Unlocking the family's gun safe and removing its 9mm pistol, Petric returned to his parents' bedroom and told them to close their eyes because he had a surprise for them. He fired and hit both in the head. His father survived, but his mother sadly died for his idiocy.