Hostile Waters for the new edition of RPG classic TWILIGHT: 2000 is a modular expansion that includes everything you need to play in a marine environment. Hostile Waters is loosely based on Pirates of the Vistula for the first edition of TWILIGHT: 2000 but designed to be used for any waterways.

This boxed set includes new combat and travel rules for marine environments, military watercraft large and small, new factions for the PCs to tangle with, new plots to unravel, and new scenario sites to explore – including the USS Maine Ohio-class nuclear submarine. It also describes the two sample waterways: the Vistula river and the Göta Canal.