Hi, I have just purchased the second edition Band of Heroes and Heroes of the Motherland (Core Rules 4.1) and wish to purchase Dark July and Noville (I obviously I like the game system). Do I really need to buy Not One Step Back to play these games? The only place I found Not One step Back for sale it was over $100. (I don't like the game that much). P.S. I know this is not a rules questions per-se but it seemed the best option of the categories given.