The Nintendo 3DS has a slider in its side. A slider that adjusts its namesake feature, three-dimensional imagery, up and down in intensity relative to the user's preference. Now, although the 3DS' screen doesn't force glasses on you, it does demand that it be held just right in order to get the most out of the 3D effect and we can imagine plenty of people might neglect its extra dimension in favor of old-fashioned 2D (not to mention those who can't tolerate the third D for health reasons). It's encouraging, therefore, to hear that Nintendo has taken the stance that no game should require 3D as part of its gamepla
