@Netclaro - Just thought I would point it out, that on Arkham City, you can use the challenge save, and turn your PS3 off as soon as one of the trophy pops. Unlike Asylum, it doesn't pop the Gold first, and work its way back....it starts with Bronze. So as long as you stay offline, and eject/turn off power, its entirely possible to make the challenges look legit on AC. I did it on my secondary account, using my own save from the main acc. Try doing the easiest combat/predator challenge, and remain close to your console, as soon as the trophy pops, eject/turn off the console. Give it appropriate amount of time, then do the same. Works the same way for Predator challenges as well. Go for the easiest ones. I hope this was helpful