Ubisoft has said that the Wii U's lack of processing power is the reason why it decided against porting Assassin's Creed: Unity to Nintendo's machine.
It couldn't, it really couldn't,” creative director Alex Amancio told the Red Bull games blog.
I mean this is why we from the beginning, this was going to be a new-gen-only title, because the crowds aren't aesthetic, they actually have impact. If we did anything to hinder that or to reduce that it would have a detrimental impact, it wouldn't be the same experience.
I don't think that would be fair to fans, to sell the same game but with different levels of experience. Even the seamless nature of the series and the scale of the game right, we couldn't do that. We never load Paris. It wouldn't be possible, in our minds we'd be cheating fans by providing a lesser version of the same game.”
That doesn't explain the decision not to release Assassin's Creed: Rogue – which is heading to PS3 and Xbox 360 next month – on Nintendo's machine, of course.
The Assassin's Creed series has historically been one of the few third party brands to stick with Wii U, with both Assassin's Creed III and ACIV: Black Flag being ported to the console.
Ubisoft still has Watch Dogs on the way to the machine, however.