George R. R. Martin’s Song of Ice and Fire universe has some advantages for a writer who wants to tell a new story there. For one, it has some elbow room. It’s detailed, it’s fleshed out, but not so much so as to leave no space for new ideas. Martin hasn’t filled up the sandbox to the point where trying to build something new would knock down what’s already there.
Telling a story is only part of making a game, and that’s where the Game of Thrones game falls down. This feels like a novella turned into a role-playing game against its will, which makes it tough to recommend, no matter how addicted to Ice and Fire a fan might be.