Titanfall 2

Story related, cannot be missed.

Cooper's Logbook:

Our journey through the IMC Dynamic Testing Facility was supposed to be a shortcut through some difficult, but it wasn't a very good one. No more shortcuts. We've arrived at the rendezvous coordinates for Major Anderson. All we have to do is find him and get some answers. What happens after that is anybody's guess.

Pilot Helmets 0 - The 2 listed are the ones from Chapter 3 of this mission, but you can get them during Chapter 1 if you like.

Objectives:

1. Find Major Anderson.
   Find Major Anderson and rifts through time will happen as you proceed to search for him.
2. Search the lobby for Major Anderson.
   You will find BT who analyzes the corpses and verifies that none of them are Major Anderson. Search the lobby for Major Anderson as BT cannot search that area.
3. Retrieve Anderson's helmet.
   Inside the lobby, you'll find Major Anderson dead. Kill the Prowler in your way and retrieve the helmet for analyzing.
4. Return to BT with Major Anderson's helmet.
   Simply return back to BT with the helmet so he can analyze it.
5. Use the zipline near BT to access the complex.
   Your logbook will update and BT will make a zipline for you to ride. Take it to reach the complex.
6. Search the complex and gather Intel.
   Inside the complex, run past the robots and kill the two IMC Grunts as rifts in times occur.

Pilot Helmets 6

Objectives:

1. Take Anderson's wrist-mounted device.
   At the start of Chapter 3, you'll see Anderson's waist up ahead. Take the device of his wrist. The device allows you to Time Travel with .
2. Search the complex and gather Intel.
   Return back to searching the complex to gather any Intel that you find. You will end up finding a Holographic Log of Anderson which will unlock the Following the Footsteps trophy. Keep continuing with your Intel search and finding more of Anderson's Holographic Logs.
3. Return to BT.
   After getting all the Intel you have about the Ark. Make your way back to BT by leaving the laboratory.

Pilot Helmets 2

Objectives:

1. Return to BT.
   Make your way back to BT and embark with him.
2. Extend the bridge to the Fold Weapon Prototype.
   Use your Time Travel Abilities to lower the doors and two Legion Titans will come out. Destroy them both and proceed with the mission. You'll need to disembark from BT in order to hack the console to extend the bridge.
3. Scan the Ark at the center of the Fold Weapon Prototype.
   Head outside and fight your way towards the Ark at the center of the Fold Weapon Prototype. You will eventually be sent to a different time rift where everything is frozen in time except you. Traverse the area and scan the Ark and the trophy will unlock.