Slice HD is an original and “sinister” $3 iPad app that requires users to move around very sharp blades in such a way as to enable the compression of a red “open” button. While trying to manipulate the blades, you have to be careful not to touch the sharp ends lest you get sliced. When this happens, fake blood splatters onto the screen, and the brain being the impressive organ that it is, really causes you to jump out of your seat as if what’s going on is real. This game is not for the faint of heart! Check it out here on iTunes.