There are several 4D games, but the one I found gave me the best grasp of the 4D world is this one [1], a puzzle in which you manipulate a hypercube. You first

There are several 4D games, but the one I found gave me the best grasp of the 4D world is this one [1], a puzzle in which you manipulate a hypercube. You first play in 2D and 3D before going to 4D. You end up with an intuitive understanding of 4D. [1] http://harmen.vanderwal.eu/hypercube/ http://harmen.vanderwal.eu/hypercube/