Assassin's Creed + Kittens = Amazing. I have no idea how the hell they managed this, mind. Have you ever tried getting a cat to do anything? Most of the time they just sit there, slow-blinking at you or, alternatively, they just wander off in the opposite direction, or start licking their bits.
These are all male kittens, of course. Getting female ones in would have cost twice as much and doubled the production work.