Go to options, the unlock menu. Then press triangle, circle, up, left, R2, right.
Super Strength Potions
This is a cheat that makes your strength potions way better. Go to options, the unlock menu. Then press square left right X R2 R1. Then you will have a stronger strength potion.
Unlock Elite Challenges
In the Main Menu, open Option, and then Unlock Menu, and type in this code:
TRIANGLE, UP, A, LT, RT, A