This is music for one of my awful RPGs. This plays in the last few floors of an extra dungeon-crawling mode, where you begin to unravel the secrets behind a tower you are within.

This is the "hard" version of the song. As you get deeper into the area, it gradually fades into this version, as you can see just how serious things are. Before that, when you first arrive but haven't gotten too deep in, another version plays.