How to find all COG Tags in Act IV Gears of War 2

This is a walkthrough for Gears of War Act IV Collectibles Achievement to find all COG tags.

#28: Locust Terminal
Act IV Chapter 1:
The terminal in the left corner of a room where you fight a bunch of locusts.

#29: Prisoner's Journal
Act IV Chapter 2:
Where you first wait for the locusts to pass, left of the terminal ahead.

#30: Locust Jailer Document
Act IV Chapter 3:
Beginning of chapter, follow a path through a doorway on the right.

#31: Human Finger Necklace
Act IV Chapter 3:
There is a part where you have to run through a door as it is closing on you. Instead of going through it, turn right before it and keep running because there's another closing door down that path that has the collectible in it.

#32: Locust Calendar
Act IV Chapter 4:
As you go up some spiral stairs, look for a big obvious sundial-looking thing.

#33: Locust Defense Plans
Act IV Chapter 4:
After you flip a switch and cross a bridge, find it near an ammo box.

#34: Locust Invasion Map
Act IV Chapter 5:
Before stepping on the lift, keep following the path to find it by some stairs.

#35: Trinity of Worms Artifact
Act IV Chapter 5:
At the split, choose the LEFT path and follow it to the very end.

#36: Locust Tablets
Act IV Chapter 6:
Second room in the chapter, find it by a pillar in the corner.

This guide is for the new GOW2 and shows you exactly how to cheat and get the achievement. Achievements are accrued in XBOX Live to show everyone how many games you've beat over time. Join Delta Squad and the legion of COGs as they fight the Horde in this war for energy reserves. This is a combat game exclusively for XBOX 360. Gears of War 2 is a tactical third-person shooter video game developed by Epic Games and published by Microsoft Game Studios for Xbox 360.