Friesematenten: Die Schattenmänner is an expansion for the basic Friesematenten game released by Amigo Spiele in 2010 and cannot be played on its own. "The Shadow Men" includes sixty new cards and forty wooden markers that allow for a variety of new actions. The markers come into play through the cards: Some cards come into play with markers, other cards produce markers during the production step, and some action cards can also introduce markers. The effect of the markers depends on the card on which they are played. Action cards with markers may be executed several times by discarding a marker instead of the card itself to pay for the action. Other cards may have their values (such as victory points or production) changed based on the number of markers on them.