IGN guides you through the final mission of the ridiculousness that is Saints Row IV. *SPOILERS AHEAD* The leader of the Saints fights his way to Zinyak and, using his new (and very literal) power armor, battles the alien overlord in the climactic showdown (read: giant robot fight) that will decide the fate of the human race. For completing this mission you unlock the "Imperator" trophy / achievement, Iron Saint suit, as well as the ability to alter the time of day within the Steelport simulation and summon a mech suit (power armor). NOTE: If you complete this mission after finishing all of your crews Loyalty Quests, you will not only unlock a longer / alternate ending cinematic, but also the "Saints & Sensibility" trophy / achievement.