This is where the music goes.
Share video game music that you think is awesome, epic, or gives you the feels. Any feels. Except terrible feels--we only want awesome music here. Discussion of music is also fine, because list threads are dull.
I'll get us started off:
Ys Origin
"Scars of the Divine Wing" (boss battle theme)
Mass Effect 2 - Overlord DLC
"Boss Combat" (boss battle theme)
Parasite Eve
"Plosive Attack" (boss battle theme)
... I'm sensing a pattern here. I think that pattern is... boss battle themes are awesome.