Assassin’s Creed has spanned many time periods so far, and will span many more to come as it will be annual franchise for as long as it makes money for Ubisoft. The image above could probably be from one of the eras we’ve seen already.
That said, if you told me that this was a rogue member of the Night’s Watch from Game of Thrones who felt like wearing white instead of black, I’d believe you. I’d love to watch an Assassin cut through Wildlings and White Walkers, though I suppose he’d need a obsidian blade for that last one.
The artist here is EVenture, and she’s got a ton of awesome stuff over at her DeviantArt.