In this list, I have selected music that is often overshadowed by the title theme or the well-deserved ending theme that we lure for after spending hours upon hours trying to beat a particular game. I have excluded title themes and ending themes as they deserve a list of their own, enjoy!
16.Battletoads: "Ragnarok Canyon"
15.Rad Racer: "San Francisco Highway"
14.Rescue: "Sneaking Stage" (Outside the embassy)
13.Double Dragon II: "Mission 8"
12.Castlevania: "Stage 13: Heart of Fire"
11.Double Dragon III: The Sacred Stones: "Mission 1 (Part 2)"
10.Contra: "Waterfall theme"
9.Ninja Gaiden III: The Ancient Ship of Doom: "Act 2 (Part 2)"