This is for those needing the "Staying Alive" achievement and those trying to finish off "I Will Survive". I'm playing on Normal with Leonardo, and the same strategy can be implemented on any difficulty, but I chose normal to help out with the latter achievement.
The Strategy:
#1 - Circle Shredder until he fires an energy blast from his hands. Then hit him a couple of times then back away. Continue circling and attack when he does this move again.
#2 - Repeat step #1 until Shredder uses his one hit kill move where he levitates
#3 - Once Shredder starts levitating, get above or below him. When he lands immediately hit him a few times then continue to circle him until he does that move again.
#4 - Repeat step #4 until Shredder dies.
Keep in mind there are 2 Pizzas in this stage (at either high corner). Shredder isn't really that hard, especially if you use this strategy. You can try to hit him a couple of more times, but I wouldn't recommend it. It's also not advised to go after a Pizza in the latter half of the fight since you may caught by his one hit kill attack.
Staying Alive can get gotten in Story Mode, Survival Mode or Quickplay mode.
I Will Survive is gotten when you complete Survival Mode.
Thanks for watching, and I hope this helps!
