7. Halo Reach
Chris Staniforth from Sheffield in England; died by suffering from Deep Vein Thrombosis after a 12 hour marathon on Halo Reach. Chris reported to a friend that he had been feeling pains in his chest, with his heart rate slowing down, but it went back to normal after a while before going to bed. Chris was well known to spend multiple 12 hour periods during the week gaming on his Xbox 360, with Halo being his preferred game of choice. One last marathon session was to be the end of Chris who tragically died instantly as the blot clot travelled to his lungs forcing him to collapse and die.