In Japan, violence in games is pretty much self-regulated. In the 1980s, there was a game called Bullfighter where the matador stabbed the bull and red blood squirted out. The day after it was released, they changed the blood to green. There's more violence in games in the U.S., in things like Mortal Kombat, where they rip out hearts and cut off heads. Japanese people wouldn't come up with ideas of blood splattering all over. Japanese focus more on the intricacies of the actions, the motion.