[0:06] - Enfield Bridge Declassified Mission
You will continue through the beginning of the level, and walk down a large set of stairs. At the bottom of the stairs, before entering the battle area, you will see the declassified mission.

[0:21] - Enfield Bridge COG Tag
In the next section, clear out all the enemies, and head to the end of the bridge where you will noticed that it is damaged, and there is a large gap. Near the gap, youll find the COG Tag.

[0:40] - Courtyard Declassified Mission
You go into the second room, and then turn right at the corner to find this declassified mission.

[0:56] - Courtyard COG Tag
Your time will be limited because of the declassified mission, so be quick. Eliminate the first wave of enemies, and then another wave will appear through a new door. After defeating the enemy, go inside the building and find the small room on the left hand side. There is a COG Tag inside this room.

Achievement Never Forgotten
This achievement is attained when you recover 10 COG Tags during the campaign.

Achievement Proud Wearer
If you have been able to complete the first 10 sections of the game without restarting any checkpoints, you've unlocked a medal. Otherwise, you may have unlocked a medal by completing 10 executions or reaching level 10. If you have, go to the main menu, and select Stats & Awards. Now go to the 5th tab using , to display your medals. Equip any medal to unlock this achievement.

[1:15] - R&D Labs Declassified Mission
Upon starting this section, view the declassified mission on the right hand side wall.

[1:23] - R&D Labs COG Tag
After the toxic fumes clear, head inside the room where the enemies were coming from. Once you enter the room, turn right and head to the corner of the room to find the COG Tag.

[1:44] - Monroe Commons Declassified Mission
At the start of this section, head up the stairs, to find the declassified mission to your right.

[1:52] - Monroe Commons COG Tag
Once you reach the big hall, walk into the room with 24 above the doors. Once you walk through the doors, walk straight to the end of this room to find the COG Tag behind the desk.

[2:11] - Atrium Declassified Mission
At the beginning of this section, the declassified mission will be directly in front of you. Make sure to continue to use your pistol to complete this mission.

[2:11] - Atrium COG Tag
As you defend the bot, you will see a statue in the center of the hallway. To the right of this statue, there is a room where you can find a COG Tag located behind the door.

[2:37] - Crash Site Declassified Mission
At the start of this section, you will be next to your bot. Look slightly to right, and it will be located on a pillar next to the raven crash site.

[2:37] - Crash Site COG Tag
From the declassified mission, turn around, look at the top of the stairs, behind the bot to find COG Tag on the ground.

Achievement Open Arms
This achievement is attained at the end of the level for completing Chapter 2.

Achievement The Aftermath
Assuming that you have attained all possible stars up to this point, you will unlock Aftermath. If you havent its ok, as you can unlock it later.