The first one sounds like an appropriate beginning to a vampire-slayer or similar type of game, though I think it needs a little more... majestic(?) ending since there's usually a logo or cut scene at the end of the opening credits. ...if you see where I'm going with that...
As for the second one, the piano seems almost a little too elegant for a battle theme but I like the ideas you have going. Maybe it should sound a little meaner or darker
