I was thinking, what are the not so obvious ways for using matrices in games? We all know of matrices to be an integral part of 3D space transformation. But since a matrix is but a block of numbers, there must be interesting ways of using it for other things, specifically in games. Please share your thoughts. :)

Color matrices is the other obvious one.

Perhaps AI, neural networks and other machine learning algorithms tend to be matrix intense.

The entire game '2048' is a matrix :)

If empty cells are zeroes.