World war 1 wouldn't make a good game because unfortunately, it was basically a period of mindless killing. lets break it down: dig trench, shoot at other people in trench, get bombed, get gassed, get shot at. millions of people died in this war; the kill count usually reached in the thousands for a mere few meters of land. in essence, the sheer amount of death and the way it was brought about during this time, would probably take away from whatever game would be made.