The Thematic Campaigns:
Each of these campaigns facilitates learning the rules of the myriad expansions. The expansions are gather into 5 main themes, and each theme is a separate campaign. Each scenario of a campaign introduces the expansions gradually (but cumulatively), easing the learning curve.
The Medium Campaigns:
8 scenarios, each of which combines a cross-section of 5 expansions from the 5 themes defined in the Thematic Campaigns.
The Expert Campaign:
5 scenarios, each of which combines 8-9 expansions to tell a story (actual story included).
A game inside a game for 1-4 players.