It sounds like a dumb question but the Heroes of Normandy rating itself 7 of 10 for solo play confuses me. Any guidance appreciated on which (or all) products require those Solo Rules. I am still getting my feet wet, but it seems some products are expansions that require the Core Rules (and possibly Solo), like Days of Villainy, while other releases are standalone and so Core rules are not needed/included, such as Heroes of Normandy? Am i on the right track? ty in advance, excited to get started but not sure how to do that.