Cult of the Lamb

Knucklebones is an optional minigame available early on, when you get access to Ratau's lonely shack. To play, you and Ratau each have a 3x3 grid facing one another, and you roll a 6-sided die one after another. You will place your die roll on your grid, attempting to achieve a higher score than your opponent in each of the 3 columns. If you match a roll, like you put a 6 in the same column as the opponents 6, it will delete theirs. With this in mind, deleting Ratau's dice is a reliable winning strategy, even if it gives you a low score in your columns. You don't necessarily need the higher score, you win by default if you fill your 3x3 grid first.