Anyone know which RTS this was?

Giants: Citizen Kabuto had a RTS element to it. Perhaps thats the game you're talking about? Either way, amazing game :)

You could have giant creatures. It wasnt black or white nor rise of mythologyDannoko

I know which game you are talking about. It is most likely Impossible Creatures developed by Relic Studios (Company of Heroes, Warhammer 40,000 Series, etc.) and published by Microsoft Game Studios where you could combine torsos and appendages of different animals to create different units. I played that game and still own it. It is a serious kick ass game and won a recognition from Gamespot in 2003 for advanced AI. I hope that answers your question.

dont think it was. I remember there was a giant ant/bee looking thingDannoko

lol ant/bee.idk what it is tho.