This achievement involves a little skill but shouldn't be too hard to obtain. You'll have to hack into 15 computers in the modern world (you'll be in first person.) I am pretty sure there are more than 15 computers to hack but you need to have at least level 2 security clearance in order to find 15 of them. I found this video explains on how to get the achievement with minimal spoilers, very well. I hope it helps you as well. Best of luck gamers!
The video was done on the 360 but it's the same layout as the Xbox One's version, so do not worry about what system it is on.
Video Credit goes to: ACFollower