Originally Posted by
Petrikow
Chaos Theory contains a lot of elements from all routes, even though its supposed to be 'Illya route'.
I was going to say the same, amusingly.
Could you delve a little deeper, like what sort of elements?
Generally, it draws most-heavily from Heaven's Feel, while mixing in some UBW elements. This is most obvious in some of the early parts, before things diverge further from canon routes.
I wouldn't say it's really an attempt to merge the canon routes, but it does draw elements from each of them, while going to do its own thing, and I'd highly recommend it.