The gaming console space up to a couple of generations ago, prior to digital distribution, is pretty well covered (and I've contributed ~75 titles and variations of console-based prototypes myself to the public), but most modern gaming is going to have a much more pronounced preservation issue.

Consider also the download-only releases of console games, usually by indies but not always, nowadays on the big 3 platforms; other than avenues like Limited Run Games that provide for production of limited physical runs of previously download-only titles, they're lost to the aether eventually.