Full discussion here
A bit of a non-standard post as I don’t think you can actually play them for free yet (I can’t see any binaries available and there’s a disclaimer that you need to already own the games, presumably for assets/art), but a pleasant surprise and hopefully something to keep an eye on!
To make things extra confusing I think this is explicitly the code for the games but not the IP. As in the assets, art, etc. are not free, and you can’t just make your own game and call it Command & Conquer.