There seem to be a number of affordable (or free) 2D game engines now that do your basic sprite rendering, etc. It might be nice to see a features and performance comparison between them. Most of them have some demo apps that bounce a bunch of sprites around the screen, etc., but the demo apps are all slightly different. I'm thinking of drafting up some well-defined benchmark tests - for example, at a fullscreen resolution of 800 x 600, render 500 alpha-blended rotating sprites each at a size of 64 x 64, all from the same 32 x 32 texture (with more specific details than that, but you get the idea). I would then take this set of benchmark specs and hit up the developers and/or advocates of the different 2D engines to write demo apps to these specs. People could then benchmark the tests on a variety of systems. I wanted to find out from the devs here: 1. How much interest is there in something like this? 2. What kinds of things would you like to see tested (i.e., with/without sprite rotation, fixed screen rendering with dirty rect optimization, etc.)?