The new stamina system (which is only in the PS4/XBO versions) has three tiers, and certain attacks have "tired" animations if you're in the third tier. Crawling to the ropes and staying down after hitting a finisher are all tied to the new stamina system, too. None of that stuff is in '13. You're thinking of the old adrenaline system which is still present in the PS3/360 versions of 2K15.Did you guys know that the momentum and adrenaline meters that are in 2K15 that were touted as being new things were in 2K13, but were set off by default?