I really wished, you posted this as flash animation. Sprites get extremely blurry when they are exported into a video format.
But holy crap, who cares. The battle was so intense. It was outstanding. So fluent, well-paced, no second too boring. The flashbacks from "Day of Sigma" were fitting aswell.
This deserves more credit. What's up with the low rating, guys?
I think, I saw one version of YouTube, but I don't if it was the same guy.
As I said, my complaint is that it's very blurry. It made my eyes hurt after awhile.
Either way, very well done. I hope, you'll make more in the future.