Can you buy the expansions and still play them with the original version the first set?

Rick

You can play the expansion, Beyond Good and Evil, with the first print of Shadows of Omega without any problems except that the cardstock is different and the boarder color on the back of the card is different between the two so players will be able to tell if the next cards are expansion or original before they are drawn. If you can get over that it's fine but all the same I'd recommend you try to find the newer printing of Shadows just so you don't have issues with it and so you get the better cardstock.