Hardest Part of Childhood. Sly Cooper, for the PS2 Not sure if it's the first or second installment .. The sly cooper series is one of my favorites. I'm still pissed thieves in time was for ps3 only. Hardest Part of Childhood Sly Cooper for the PS2 Not sure if it's first or second installment The sly cooper series is one my favorites I'm still pissed thieves in time was ps3 only