[quote=WeepingLiberty]
I've got the general idea of Code Geass but I don't believe I'm familiar with Horus Heresy... Could you explain?
[/quote]

Oh boy, this will take a while. I might have to do this after work. Horus Heresy takes place at the end of the 31st millenium (so about 28,000 years in the future). Here you have super genetically modified soldiers and countless humans fighting aliens, demons and even the will of the gods.