This Comic's Cast:

I'm not saying that's definitely the case. All I'm saying is that it could be the case. Adventure games are mean like that. One of the two locations could have a key hidden inside, and if you go there first, you get to open both locations. Otherwise, you only get to see one.

Hell, the classic Atari 2600 game Adventure (which was an adventure game done without text) had a version of the game where all the needed items were placed randomly. The keys to the castles that you needed could, in all theory, be hidden in the castles themselves leaving you unable to finish that round of the game.

Adventure games are the cruelest mistresses.
 
    

When evil spreads across the land, and darkness rises and the monsters roam. When the creatures of the night make beautiful music, and the things that go bump in the night go bump with greater enthusiasm. When the world is in peril and is in need of a hero...

These guys are, sadly, the best the world can hope for. These are the adventures of the heroes of CVRPG. They mean well, they try hard, and occasionally they do the impossible...

They actually do something heroic.