Well, I havent played that game so Im unsure. But you would be able to show blood to an extent, as I said. Though I dont think you would be able to show much gore, if any.
Although, I havent heard much about ut, but you may be able to add in the new boolValue which determines if the user is under 13. Which you could make it so that if the player is, under 13, you could hide the blood/gore, and above 13, show it. I dont know much about this.