I have mentioned a number of times about using Barbarian Prince for a roleplaying setting or how I am adapting some of the mechanics from the game for my B/X campaign. This got me thinking about other wargames or boardgames that could be used to supplement a D&D campaign. We all know that Avalon Hill's Outdoor Survival was and continues to be used for a map for wilderness exploration. In fact part of it has been adapted into the Northern Marches.
One thought that came to mind was taking the mechanics and cards from Kingmaker and adapting it for a Greyhawk campaign. The game could be set in Furyondy or Keoland and it could focus on political intrigue.
Another thought could be to use Citadel of Blood to develop a wizard's citadel. Or the related Swords & Sorcery game's wilderness map could be used in a similar fashion as Outdoor Survival.
Awhile ago, Jeff Rients mentioned using Divine Right as a campaign setting.
Has anyone else used a boardgame's or wargame's mechanics or map for an unrelated RPG?