Syndicate
50 Achievements
1,000
40-50h
Mastermind
Unlock the Datacore in the minimum number of breaches
5
How to unlock the Mastermind achievement in Syndicate - Definitive Guide
Chapter 19: Burning Tower
Difficulty: Any
At the very end of the chapter, you'll have to quickly hack two devices to open the giant locked door (LB). You must ABSOLUTELY take advantage of the slow-mo that is provided by the Dart Overlay or you won't be quick enough. Don't worry if you fail, you can simply restart to the last checkpoint.
Chapter 19 - Burning Tower. When you reach the end of the chapter you will have to hack two panels in order to open a gigantic vault. You have to use your DART Overlay to slow down time! Hold down to hack the panels. You need to get the second panel in view while you are busy hacking the first one. Moreover, make sure you didn't try to hack any of the panels by accident (e.g. when fighting the wave of enemies in front of it). The trophy will only unlock if you hacked both panels only once and opened the door right away. Restart the last checkpoint if you fail.
At the end of Chapter 19, you'll encounter a big round door with lights surrounding it. Simply overlay (and you have to use overlay) and breach one side, then the other. If you miss it somehow and fail, just reload your last checkpoint to try again.