There's a DVD compilation of all of the Command and Conquer games to date coming out early next year. Except, ironically, the only one that I haven't played and finished for every available side: Command and Conquer: Sole Survivor, the online-only C&C spinoff with the ridiculous premise of having each player control a single unit, and the last unit standing wins.
What's interesting, though, is that only a couple of these games work on modern PCs. It seems unlikely that they would have gone through the whole collection and made them work on Windows XP, and yet if they didn't, I'm not sure what the point of the collection is. That's the sort of thing that would only appeal to the most rabid fan—the one willing to set up another legacy PC to play those games—the person who has all of them already. Is the target consumer the hardcore C&C fan who has recently lost their discs?
Or, maybe the unthinkable has happened and they actually have patched the games to work on modern PCs. That would be pretty cool, actually. I don't think I have nearly enough desire to go back and play the old classics to buy such a collection, but it's still cool.