This achievement is basically an achievement that you can’t get by trying, it’s pretty much random. You need to slice both the fingers and the toes off at the same time, not the hand and the foot. You can use the in focus vertical slice to cut them off. You can either aim to the very left or right using the when attempting a perfect vertical slash or you can use to kick them away and move a little to the left or right to better target the toes and hands. You’ll unlock this achievement without even trying throughout your gameplay, but if need be use those strategies if you’re having trouble with them.