The video game tie-in will be available on Xbox 360, PS3 and PC from June 8.
Its release is timed to coincide with the TV show's season two finale airing on Sky Atlantic on June 3.
The Game of Thrones game is set alongside the events of the first book, and features two original playable characters and a choice-driven story.
Mors is a sworn brother of the Night's Watch who can take control of his faithful dog for unique sneak attacks against enemies. Alester is a more nimble character, and as a Red Priest can command fire in his attacks.
The role-playing game promises to be an over 30-hour long adventure taking players across Westeros to locations from the series including King's Landing, the Wall in the North and the waterside town of Riverspring.
The Game of Thrones game was released in the US earlier this month.
> Game of Thrones preview: Westeros gets a new interactive story
> Game of Thrones game: Send developer Cyanide Studio your questions
Watch a developer dairy for the Game of Thrones game below: