Hi, this is not my save but I share with you. In Challenge mode Just do one and get.
Olympian 40g
Obtain all medals on the original Campaign maps in Challenge mode (as Batman).
Medalist 40g
Obtain all medals on the original Ranked Maps in Challenge mode (as Batman).
Perfectionist 20g
Obtain all the medals on Custom maps in Challenge mode.
Personal Trainer 10g
Obtain all the medals on Combat Training maps.
I hope it helps ....
https://mega.co.nz/#!SU9UjK7Z!WlPR5F...Oe228CKnD8rsiI