There are too many war games.

[Tispower]

I remember reading something about this. The reason there's so many games on WWII, is because it is kinda the perfect war to use. You've got a wide variety of vehicles and weapons to use, unlike something in medieval times, where you'd be limited to different saws, in WWII, you can have weapons that are vastly different. Also, the whole world was basically involved, so it allows developers to choose from a wide variety of locations. Also, compared to other wars, it has been greatly documented, so easy to work out what happened. Finally there's plenty of stories/diaries that developers can use to base their games on.

Finally, most developers for things like FPS, are likely to be American, and (IMO-don't bash me for it) they seem to like portraying themselves as the heroes/world rescuers etc etc. So why not portray Ohama beach were the American's (no, not the Canadians or British, they didn't do anything apparently) beat the Germans. Thus saving Europe. Unfortunately, cos it's only subtle really, these games sell well all over the world. Whereas, few people do games on Vietnam, because it is less likely to sell well in America. Same with other wars.

Present war games/hypothetical games will always sell well, because people like exploring an alternate reality, based on reality, kinda thing.