Track that plays after the intro cutscene (track & explanation here: https://www.newgrounds.com/audio/listen/1173586 ). Zaz wakes up after falling into Hadeston, only to find four strange lookin' people standing around him. It appears they've been trying to wake him up. The blue haired fellow in the group asks if Zaz is okay and then introduces himself and his friends to him. He then invites Zaz to come with them into their home, to which Zaz agrees, considering the situation he's in. Little did he know this was the begining of a far greater adventure.

Hellbent Concept OST playlist