The Great Game is a set of rules for a two player card game in which the Russians and British vie for dominance in Central Asia.
Using a standard deck of cards, Jim Wallman’s Field of Honor is:
a simple two player card game that is an abstract depiction of two armies facing each other on the battlefield. It can either be played as a simple two player card game, or as a sub-game to a more complex wargame � say a campaign where you wish to resolve minor battles without resorting to setting out model soldiers.
Warpspawn games has a vampire hunting game called Methuselah designed to be played on a chessboard with a custom set of cards. One side plays Dracula and his minions, the other the vampire hunter and his assistants.
I think that some of the ideas could easily be lifted for use in more traditional miniatures games.