Board Thread:Questions and Answers/@comment-27125903-20160328223438/@comment-27125903-20160330054247

Drake 512 wrote: I guess is that one with HR Jade Barroth and Glacial Agnaktor... But I'm not sure... (IIRC that Quest can be done only with Bowguns...)

Maybe you hear that theme, when the Monsters Of the MGSPW collab quests spots you before starting the MGSPW main theme, but I could be wrong...

That one With Giant Nibelsarf Plays the Metal Gear Solid Peace Walker main Theme... From what I've seen... it is the spotted theme for when one of the metal gear monsters find you.

I also remember an agnaktor in the volcano having the theme but I'm not too sure.