Story related and can't be missed.
This achievement is unlocked when you have completed all 3 missions.
*** Spoiler - click to reveal ***Mission 1: T-Bwned
Objectives:
Escape the ctOS Center.
Kill all enemies or escape.
Reach T-Bone's base.
Enter the silo
Activate the security system.
Go to sleep.
Find the car with Tobias in the trunk.
Take down.
Get in the car.
Kill all fixers or escape.
Bring the car back to the base.
Mission 2: Fading Signal
Objectives:
Reach the target location.
Profile the 2 targets to knock out.
Profile the target to knock out.
Knock down the targets.
Knock down the target.
Leave the area.
Mission 3: Needs of the Few
Objectives:
Meet Tobias in the Silo.
Pick up Eugene.
Reach the BlumeForge building.
Infiltrate the building.
Find the central computer.
Escape or eliminate al guards.