Seriously. Some dude beat Super Mario 64 using nothing but his feet... and got every star. Have some doubt? Well, here's a video of him getting every star in the clock level (suggested by the excitable SpiderHyphenMan, who also sent me the tip), with an inset of his feet working the controller. There is a bit of editing, but only when he fucks up (he returns to the spot where he feel, etc.) or speeds time up when Mario needs to stand still (you'll see). Oh, and here's a site with links to him beating every other level in the game. Can I tell you my favorite part about this achievement? It's that this dude does all this wears socks. Because feet are gross.