I agree with BB, I'd give it a pretty solid 7/10, not garbage by any extent, but it just doesn't seem to highly thought out, they do the whole waves of enemy's thing, but often times not even from different locations (ala Uncharted), it feels really bogged down with repetitious waves xD
The "glaive" (it's not a goddamn glaive), is AMAZING. One of my favorite things about Heavenly sword was the sixaxis support for Kai's arrow's :P That returns and it's pretty damn awesome ;) Worth a rent for that reason alone ^^ The graphics are pretty awesome considering it's multi-plat with UE3 :P Probably the best use of them I've seen from a non-epic game.
Surprisingly spooky at times! Stuff kinda comes out of nowhere if you let it :) (not throwing the "glaive" ahead to see the trail ;) )
All in all it's a pretty solid game, but you might want to rent it first :)
From 0 to KICKASS in .stupid seconds.
