I'm going to second this, but also point out that Bungie SORT OF did this already, with Myth (not kidding).Emurlahn said:E Chronicles of the Black Company series by Glen Cook.
http://myth.bungie.org/legends/relics/blackcompany.html
That's the "Night Angel Trilogy" that the others have been talking about (which I personally hate).AetherWolf said:Recently I read a book called "Way of Shadows", which as you can tell by the cover, is basically Assassin's Creed with a fantasy setting. Sure, it would be an AC rip-off, but there's nothing wrong with that... right?