These are the Marsh Expansion rules for Dark Force Incursion (DFI), a roll and write game that is for one person, taking 20 to 40 minutes to play. This expansion deals with the addition of the marsh hex tile to the game. The marsh lands are hard to reclaim back for the players and probably not the type of map you would want to play your first Dark Force Incursion game on. The fact that the layout of the marshes is unpredictable can cause huge problems and take over large areas of the map, that therefore become impenetrable. A victory in a marsh region is well earned. -description from designer