Metal Slug 4's Final Mission theme.
Assault:https://www.youtube.com/watch?v=mzkwMMhP7nA
Stealth:https://www.youtube.com/watch?v=ACdD0KRwG9E&t

Made this because the previous upload of this theme was horribly sloppy: The assault cut off too early, the other segments were less than 5 seconds long, and the uploader didn't even get the name of the song right.