The video shows gameplay footage of the massively multiplayer adaptation of the HBO show based on George R R Martin's A Song of Ice and Fire series.
The game will be set following the events of the first book, as players must align themselves with families throughout Westeros as they fight for the claim to the throne.
Players will take part in Player Vs Player combat, Siege combat and politics in a bid to control the seven kingdoms.
It is being made as a free-to-play title, co-developed by Bigpoint and Artplant, who previously worked together on Battlestar Galactica Online.
Game of Thrones: Seven Kingdoms will enter beta testing later this year, and is scheduled to launch in 2013.
Screenshot gallery - images of Game of Thrones: Seven Kingdoms