Changing levels (maps) has been an inherent system of the Unreal Engine since its inception. So, naturally, there are several tools and options that have evolved with it over the years. That said, we already have all the tools needed for basic level changing, but it's still instructive to walk through them, and we'll update our loading and saving in this section to keep our progress and game state during those switches. First, a quick review of the foundations of level changing in UE4.