Call of Duty: Advanced Warfare

Story related, and cannot be missed.

To earn this trophy, you must complete the 14th mission, Captured. Below are all of the mission objectives of the mission, along with a small walkthrough.

Mission Objectives:

• Escape the Facility
  This objective remains active during the completion of all other objectives.
  *After “Activate the Elevator” this objective will return to your primary objective. Follow Gideon through several combat zones killing enemies and moving forward. Drop into the shaft and escape being incinerated to open another objective.
• Follow Gideon
  Follow Gideon through a short sequence until you obtain an EXO suit. The objective ends when you obtain a weapon. Gideon also informs you that you cannot reload in this chapter because you only have the use of one arm. Pick up new guns when you run out of ammo. Pick Up 20 guns in this mission to earn Heavy-Handed as well.
• Activate the Elevator
  Right after obtaining your EXO suit, you will have to activate an elevator in the next room via the nearby console. Kill the two enemies that enter the room to complete the objective.
• Reach the Warbird
  Fight through the outdoor section and listen to Gideon talk about Manticore. Run through the next open area before more enemies arrive to complete the objective and also end the Escape the Facility objective as well.
• Enter the AST
  After the Warbird crashes, enter the AST when you regain control of your character.
• Regroup with Ilona
  Use the AST to kill enemies in the next few combat zones and follow your waypoints. You’re practically invincible in this AST suit, but play a bit defensively when you reach the area where 3 other AST units come up from the floor. The objective completes when you lift the gate for Gideon to pass under and reach Ilona.