Campaign / mission / scenario 

This sentence: 4X games do not typically feature a campaign or scripted narrative, as this would interfere with the freedom of building a massive empire over multiple hours of gameplay.[18] cites a review of a single game.  In my experience, many, if not most, do have a mode for campaign(s); or sometimes individual missions/scenarios.  Often, these are included in an expansion pack; or can be downloaded as player-created scenarios, etc. The use of "feature''" in the sentence might be accurate, but is a somewhat weasel-deceptive. ~Eric F 184.76.225.106