The game uses historically accurate campaigns, weapons, locations, battlefronts and scenarios which players must manage strategically in order to bring their side to victory. "Crusade" can be played by two or more players each using a deck chosen to represent either the German or Allied Powers. It was also formatted to have the capability of a solitaire mode during which the cards can be used to play the classic one person card game. Despite the game's loss of popularity, online decks have been created and modified as recent as 2005 to include more weapons, countries and campaigns. These cards, while not an official part of the card game, have been adapted by devoted gamers who can print them out and add them to their collection.