Board Thread:Sly Cooper: Thieves in Time discussion/@comment-31.100.217.41-20130416190130/@comment-1824272-20130418054119

I did it as well, and it's actually fairly easy. Maybe a little time-consuming, but nothing like some other games. If you want to see an "impossible" Platinum Trophy, look at WipEout HD. :P

Trophy guides on the internet (I'm particularly fond of PS3Trophies.com) will definitely help you out.