Mashiki Amiketo wrote on Dec 4, 2012, 17:15: Yeah, I didn't buy the last one either. I'll wait for them to go on sale.
Yup, that's what I did for Civ5; bought the "gold" edition or whatever it was called in an Amazon sale and redeemed it on Steam and it gave me all the DLC. I guarantee 2kgames will do the same thing with X-com as well eventually. I'll just wait till then or grab it on a nice sale if I really can't do without.