His name was Mats. In 'World of Warcraft,' he was Ibelin. A new documentary tells the 'coming-of-age story' of the late gamer's hidden life.

When Mats Steen, a Norwegian gamer who spent endless hours playing World of Warcraft, died at 25 from a degenerative muscular disease, his parents had no idea just how vibrant his life was despite having a condition that had robbed him of almost all movement.