I haven't tried it myself yet, but I plan to soon.
You can find it here: (you need an account to see links)
Are you strong enough to claim the Iron Throne?

Choose your House and rise to power and glory in the land of Westeros. Begin your conquest on the field of battle or in the terrors of the night. Join the great houses of the Seven Kingdoms on your path to victory.
Looks pretty cool, I've never watched the TV show but the game looks pretty neat.