User blog comment:Draevan13/Why is the 2012 RPG not considered canon on this site?/@comment-26308-20131215171252/@comment-26308-20131218153641

IMDB is user-editable and is highly unreliable as a resource.

GRRM did not play the character in the game. I've met and spoken to George on multiple occasions, and that is not him in the game. I'm pretty certain's he's also said he didn't do it in response to a fan asking the question.

GRRM did also NOT write any material for the game. In the actual game credits (which I just had to watch in full to settle this) he is listed as a 'Thanks to' and that's it. He is not listed under 'voice cast' and he is not listed under 'writers'.

The game is not part of the TV or book canons. GRRM did not co-write it and he did not voice the character in the game.