This Seeking Tech video guide will show you how to get the Wutai’s Nemesis trophy and achievement in Crisis Core: Final Fantasy VII Reunion.
This will unlock when you do the following:
Caught all the Wutai spies that had infiltrated Midgar.
This side quest will open up in Chapter 5, so make sure you complete it as soon as possible.
Check out the video below to find the locations of all six spies: