It's a branding campaign for Saida de Emergencia (Emergency Exit), a Portuguese publishing house that handles the Game of Thrones book series.
You'll note that they've made an embarrassing mistake in the second ad, below, calling Jaime and Cersei Lannister "brothers" instead of siblings (or "brother and sister", I don't know how it's done on Facebook, I'm an only child). But, these are translated versions of the ads (for publicity purposes), and it's probably correct on the original. I hope. Overall, the ads could have been much funnier and more engaging. But, a game attempt.
Ad agency: Fuel, Lisbon.