There are some out there. I was working on a game using the original Rise of the Triad engine which did 2D sprites, but the idea evolved to larger than that eng

There are some out there. I was working on a game using the original Rise of the Triad engine which did 2D sprites, but the idea evolved to larger than that engine could really support. I'm now making a modern engine but keeping some of the philosophy to target low spec machines, so some of my "models" are 2D sprites.