Ninja Gaiden Sigma 2 costume pack, which was released on the PlayStation Store yesterday for $3.99, it's not because we're pervs or anything. It's because the skimpy outfits you see above were meticulously engineered to maximize our capacity for flipping out and killing people.
Also, we realize Ryu's new costume (which was previously handed out as a pre-order bonus) isn't more revealing than his standard duds. See, the above rule only applies to female ninjas. Hey, don't look at us like that. We didn't write the ninja rulebook, okay?