From Drivethrurpg.com: In the tradition and using the system of Swordsmen & Skeletons, Nazis & Nightmares is OGL style World War 2 fantasy /science fiction / horror / super heroic roleplaying game, streamlined down to a single piece of paper, plays very similar to the oldest fantasy roleplaying systems, and is compatible with most games and supplements written in the 1980s and earlier. Please note that N&N is NOT a complete rpg, and requires Swordsmen and Skeletons to play as a roleplaying system and Milton Bradley's Axis & Allies (TM), any version, or a similar WWII board game to play as and track the campaign.