Perhaps Ive been missing out on the 4D gaming revolution but I do not understand what the 4th dimension is here. Feels like I am missing out on a lot of context.
it's a fourth spatial dimension. if you imagine a cube, it has width, height, and depth. a 4d cube would have width, height, depth, and zhlerp, which is its size along a fourth spatial dimension. in three dimensions you can go forward and backward, left and right, up and down. in four dimensions you can go forward and backward, left and right, up and down, and zlep and wizz, moving along the fourth spatial dimension.