RaggyRock: Would be great if I could "activate" these games on gog. So that I would not have to repurchase them all (I have purchased most of them alreddy).
GOG already allows a certain few games to be redeemed, based on code (you need the code provided with the retail package, though). And they even promised to expand on that, in distant future. Logically, though, no one should keep too many hopes up. Most retail codes are usually Steam-redeemable, even concerning games that aren't steam only. And then, Steam identifies and allows redemption of CERTAIN keys, with CERTAIN FORMAT, not everything or anything, even if that specific product already exists in steam store already.
Try to redeem in Steam/Origin, first. Because in gog, redeems are a very long way from coming up. I myself redeemed certain games there on those two, even though i hate them both and have been an exclusive gog gamer/customer for years now.
That red alert 2, though, smexy game. Too bad you didn't get its expansion, it was pure epic win. Ah, and sad thing about redeeming on Steam or Origin, is that you are NOT guaranteed to be able to play the games you redeem smoothly, if at all, especially concerning OLD ones. Only GOG as a service, constantly tweaks and modifies OLDIES, so they can be executed normally on modern systems. And Steam's support is abyssal and epic fail, god help you should you ever need that, at best (9/10 they redirect you to the specific game's developer you had issues with instead of helping you solve it or answers your ticket with random nonsense).