The Mayfair Games' Limited Edition Promo Expansion Set #5 is composed of 3 expansions:
Five Points: Gangs of New York – Flophouse
Includes 1 extra building tile. If you control this building's space at the end of the round, then you can remove up to 3 of your rabble from any neighborhood tile and return them to your headquarters.
Steam: City Growth Special Contracts
Includes 5 city growth markers on 5 colors. They can be used instead of the normal gray city growth markers. You place 1 of these markers on to the city when you are using the City Growth action. Now this city has a one-time demand for that color cube. When 1 cube of the marker's color has been shipped to the city, then the marker is turned to the other side, which is exactly the same as a normal city growth marker.
Alchemist: All for One, Two for All
Includes a new variant cauldron and a 3/7 potion value tile which can only be played on the new cauldron.