I've played I, III, IV, and recently courtesy of Epic's deal downloaded and played a little bit of VI on my Win7 box. Meh, and from all the comments, figure V will be better to resume civving with than VI. But, I'm completely unfamiliar with Steam, and have no desire to get on it if I can help it. The options from Amazon and NewEgg have a DVD version and an online game code version, I understand the latter is a Steam download, but there's a little question as to whether the DVD version requires Steam as well. Could someone help clarify that for me?