The teen booked a private room in an internet cafe on July 13, and went on to play the game for forty straight hours, without a break.
On July 15, a worker at the cafe checked on him, finding him asleep.
The cafe worker woke him, the teen then stood up, stretched, took a few steps, and then collapsed.
He was reported dead at the hospital, due to a blood clot which formed due to his lack of movement.
Deaths due to prolonged video game playing have been reported before, and it is something gamers need to watch out for.
Diablo III's developer, Blizzard, released the following statement:
We're saddened to hear this news, and our thoughts are with his family and friends during this difficult time. We don't feel it would be appropriate for us to comment further without knowing all of the circumstances involved. While we recognise that it's ultimately up to each individual or their parent or guardian to determine playing habits, we feel that moderation is clearly important, and that a person's day-to-day life should take precedence over any form of entertainment.