Jim Power: The Lost Dimension in 3-D is often considered by gaming fans to be one of the most difficult games ever made.[5] Despite its name, it is an entirely 2D game, although the game uses many layers of parallax scrolling backgrounds moving in opposite directions to give a great sense of depth. Together with the 3D glasses that were packaged with the game, designed around the Pulfrich effect, this provided a unique "3D" experience for the time when polygonal 3D graphics were rudimentary and too expensive to implement. The 3D feeling could also be related to the overhead stages, showing rotating effects in the same vein as those depicted in similar games like Contra III: The Alien Wars.