Chris Buffa (Modojo): With Super Mario 3D Land, Nintendo proved that glasses free 3D is more than a cheap parlor trick by making it a part of the gameplay. Switch it on, and it's much easier judging distances between platforms. Beyond that, fireballs and other projectiles take on a near holographic quality. It looks so cool, we played the entire game in 3D. Suffice to say, we wore out the system's battery more than once.