Nintendo was a trailblazer of the platformer genre, but violence has always been baked into its formula. One of the very first things you do, in the very first Super Mario Bros. game, is stomp on a Goomba. Yoshi games have typically skewed to the younger side of Nintendo's target audience, but they're often still recognizable as traditional, if gentle, platformers. Yoshi's next game, Yoshi and the Mysterious Book, is so gentle it has eliminated combat almost entirely. You can't die. You...