Telltale Games has released a trailer for “Iron from Ice,” the first episode of its upcoming game series based on the Game of Thrones TV show.

Narrated by Lena Headey, the actress who portrays Cersei Lannister, the trailer sets an ominous tone for the members of House Forrester -- long-time allies of House Stark.

You can watch the full trailer below. Check back with IGN soon for our Rewind Theater where some of IGN’s biggest Game of Thrones fans speculate about the game’s plot and point out the details you may have missed.

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Telltale also announced that some Game of Thrones TV show cast members will reprise their roles for the game. In addition to those listed below, more cast members will show up in following episodes.

Cersei Lannister (Lena Headey)

Tyrion Lannister (Peter Dinklage)

Margaery Tyrell (Natalie Dormer)

Ramsay Snow (Iwan Rheon)

IGN has the exclusive reveal on another character. Gared Tuttle is a squire to Lord Forrester, and one of the 13 Forrester characters we know about so far. Telltale describes him as a man “ready to be a warrior in his own right.” Here’s the full character description:

“Gared was raised on stories of heroism about the likes of Arthur Dayne and Symeon Star-Eyes. Though the son of a pig farmer, he has always aspired to one day become a warrior himself. With the help of his uncle Duncan, who had risen from lowborn origins to become Castellan of Ironrath, Gared found work in Lord Forrester’s stables, rising through the ranks to eventually be named his squire. Gared has served Lord Forrester throughout the long months in King Robb’s army, and is ready to be a warrior in his own right.”

We have the full list of all 13 members of House Forrester as well. No release date for the game was given, but the end of the trailer says Iron from Ice is “premiering soon.”

Telltale’s Game of Thrones series will be six episodes long, with five playable characters from the Forrester family. It will be available on Xbox One, Xbox 360, PS4, PS3, PC/Mac, iOS, and “additional platforms.” If you can’t wait for the game, read up on everything we know about Telltale’s Game of Thrones story so far.

Brian is an associate editor at IGN. You can follow him @albinoalbert on Twitter