Originally Posted by
flammey
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You have to unlock each safe-house, and then use the local computer, that gives you a project, and shows you where all the SHD tech caches are in that zone, one thing you need to do for the project is collect some. Finishing each safe-house's project will unlock that zone's Bounty boss. That's who you have to kill for this trophy. And you have to kill them all. You probably knew that, but did you find the computer inside The Campus?