For the final legendary challenge in Week 12 of Fortnite Chapter 2 Season 7, you need to find three alien devices scattered throughout the map and use them to activate a countermeasure device in Corny Complex. The alien devices are floating purple orbs found exclusively in alien biomes. The good news is that you don’t need to complete all the stages of this challenge in the same game. However, not only are there just three alien devices in the entire map, you’ll also have to sneak past all of the IO guards in Corny Complex to activate the countermeasure device.
This week’s challenges ask us to craft a weapon using alien nanites, destroy target dummies with IO weapons, deploy scanners in alien biomes, and search for books on explosions. There’s a lot of stuff to find this week, so be sure to check our guides to find everything you need.
To help you finish this final challenge, we will go over all of the alien device locations you can find, as well as what you need to do to activate the countermeasure device.
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