Scenarios are a gamemode in which you choose a person or thing on one side, and you receive certain countries depending on which side you play as. There is also a story built in to the game. For example, in a WWII scenario, one event is that Winston Churchill sends a spy to kill Adolf Hitler. And a lot of people like to do what actually happens. For instance, if they are playing as Japan in WWII, They first attempt to capture China, and then they will attack Hawaii.