You can earn this achievement once you use the ox statuette to gain access to the main hall on the first floor of the main house. The ox statuette is found on a picture frame in the upper area of the garage. The Deputy will tell you to go to the garage shortly after arriving at the main house.

Once you use the ox statuette on the double door entrance to the main hall, look straight ahead and you will see a projector. In front of the projector is the shadow plinth. Walk up to the plinth and press A . You'll be prompted to select an item. This plinth requires the wooden statuette, so put any other item on the plinth, other than the wooden statuette. I personally used the knife. You'll then see a new screen where you have to rotate the object you placed on the plinth. Back out of this screen with B . Once you back out, the achievement unlocks.