In addition, he said, war-simulation shooting games have become popular there, creating an inroad for the "Call of Duty" games.

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Mastering original jet fighter technology is a challenge and learning about one of the hottest battles of the Cold War makes it a simulation worth flying.

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Strategy board games back in the 1970s and '80s, like "Blitzkrieg" and "War in Europe, " were simulation-type games requiring players to spend a lot of time rolling dice to resolve combat or find out different game stats -- weather conditions, civil unrest, troop rally points.

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Philip Nuber, director of the Defense Mapping Agency, says that using this virtual technology in flight simulation can help soldiers in peace time as well as war.

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