Starfox Assault's SP was epic! First, (I am going in order) you puncture the enemy's frontline, then fight through a base, fight a nasty boss, then travel to another base and fight another boss, clear out an enemy hideout and have a fight, tread though frigid snow and ice in a blizzard, blast through an astroid belt, elimnate enemies on a peaceful planet, survive in a war-torn city, protect a space station from hundreds of enimies, fight the enemy on their own turf, and kill the leader.
Is that not epic enough? Oh yes. One of your allies sacrifices himself to save you and your team.