COG Tags 28 - After moving along the train a bit, you'll come to a locked door that Jack needs to rip, starting a sequence where you must deal with a Berserker. Once you're done with the Berserker, and Jack is done with the door, move through the doorway and look to the left immediately to spot the COG Tags. Click here for an image of the location.

COG Tags 29 - After grabbing the first set of tags in this chapter, you'll move through a few passenger cars, then back outside to a flat bed car, and then back inside to another passenger car. Look to the right just before exiting this passenger car to find the COG Tags. Click here for an image of the location.

COG Tags 30 - There are two spots in this chapter where you need to press a button to let loose a set of large cylinders. After releasing the cylinders the second time, move to the end of the car and immediately turn left to find a door back into the car. Move through a locked door just ahead to find the last set of COG Tags in the game. Click here for an image of the location.