Brass Empire: Kickstarter Promo Expansion contains 21 Promo Cards from the original Brass Empire Kickstarter. The set expands every corporation's identity with powerful corporate ID cards, a gadget, a new faction reserve card and a unique mining platform for all 5 factions (20 cards). It also includes a Single Player Boss Card: The Pirates of the People which is a unique solitaire variant and challenge for the game. This item was originally only offered to Kickstarter backers and people ordering directly from the publisher.