2nd person story: When a mutant nightstalker comes bearing warning of mad scientists from Arizona, what will the factions of the Mojave Wasteland do to defend against the new threat?

When a mysterious doorway is found in the subterranean Cornerian city of Tritari, Star Fox investigates. upon traveling through the doorway, they find themselves outside a rectangular stone hole in a rocky outcropping on an alternate version of the Earth they knew, not the Earth Corneria made first contact with on the Lylatian date of July 31st, 2468.