Any nonlinear game with enemies whose deaths the game keeps track of can feel pretty empty once all the enemies are gone in the places you keep coming back to. But there's one way to deal with this that actually kills two birds with one stone: spawning in new enemies to those old locations when an event triggers in the game.

It could be that you triggered an event in the story that causes enemies to show up in the place you have to go next. It could be collecting a key, and now suddenly there are enemies guarding a door you previously couldn't open. Sometimes it's visiting your old hometown late in the story, and finding to the hero's shock (but maybe