Let's talk about some strange Boss/Final Boss battle music.

[Archem]

MORE.

[Felix-0]

honestly wrapped in black is kind of catchy, but it's more fitting for a stage music, it really reminded me of Jet Set Raido Future kind of music, and therefore I like it.

Gloomy dance has been haunting my mind for the longest time. I knew it was the Human playthrough side, and I knew the ending was sad. Just watched a video, ouch. Any player who picks the human side gets a HUGE slap in the face ; A;
It makes sense that the final theme is depressing.

RADIATA STORIES『Legendary Sword Loop ver.』

Here's the final boss theme for the good ending.