ActRaiser
There are multiple stages (countries) in the game and the first stage consists of you manifesting an avatar in an action side-scroller game to fight your way through some monsters, kill a boss and liberate the land. After doing that you enter a god-mode game similar to Populous where you control a little angel cherub and you fight cute monsters and help guide the civilization level of the people of that country. Some plot device happens and then you must fight the final boss in order to free that land from monsters completely.
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