For a guy as creative as George R. R. Martin, does it come as a surprise that he's no stranger to pen-and-paper RPGs? We caught up with Martin at Bubonicon, where he gave us the rundown on his gaming cred and gave us a look into a campaign he's been participating in with notable sci-fi author Walter Jon Williams. Check out the clip below to find out why out of all the popular RPG systems, Martin prefers GURPs, a system he enjoys so much that he's had two source books written for his Wild Cards series of novels.