Yeah, doing a challenge like this for games would be much harder. Not impossible, but difficult. Complicated by the fact that, like comics, most games have more than one creator. How do you decide what "counts"?

If you're interested in increasing diversity in your game consumption, I suggested checking out the Why I Need Diverse Games project, which might also help answer your question about why I would take on a project like this at all. In short, so much of the media I consume comes from a cis straight white (and to a lesser extent, for me) male perspective, which means I'm missing out on a lot of perspectives. I want to learn more about other perspectives, and perhaps challenge my assumptions in the process.