I know it could never be done, but an open ended game of WW2. You are enlisted or drafted and you choose where you want to go and all the while the war is going on in every part of the world! It's like a real time war is going on (and it does not need to be anything other than single player, in my opinion) and you can pick anything you want to do! Enlist in the Navy right after Pearl Harbor, or enlist in the French Army right before the Blitzkrieg. And you play it out real time like a real person would have. You might be participating in the land battle in France or Poland or you might even be participating instead in the land battles in Asia! You get constant updates on the war and what is going on near you (and far away) and even updates on other soldiers you may have saved that went on to do heroic actions. I don't know. The idea seems so jumbled up... and everything you do has an outcome - a reaction to your action....