Assassin's Creed: Lineage, the series of short, live-action films serving as a prequel to Assassin's Creed II (and its own to "sequels"), will be out on DVD this November.
To be released by New Video, they'll be collected into the single volume on DVD and Blu-ray and released on November 15. Included with the set will be the Assassin's Creed: Ascendance animated short (released last year) and some making-of features.
Why all the extra stuff? Well, you can watch the whole thing for free right up top there if you haven't yet seen it.