Walkthrough for Trainyard of Project I.G.I.: I'm Going In.
1. Go forward to see a ladder to the roof in your left.
2. Go up the ladder and then zoom in on the sniper on the tower in front of you and kill him.
3. Go left to find a hole with a ladder to inside the building.
4. Go down the ladder and pick up the gun on the boxes.
5. Shoot the door once with Uzi and wait for enemies to come and then kill them one by one. Two soldiers will come to door.
6. Pick up their AK47 and head to computer room in your left before exit door and disable cameras. Security Cameras will be off for 2 minutes.
7. Exit the building and go left. Climb up the ladder of the tower where the sniper you killed was.
8. Take sniper's gun and zoom in to the tower in front of you.
9. Kill the guy on the ground, then camera in middle of the tower and then the guy on top of the tower.
10. Zoom in on your left to see two soldiers walking around the left building with a security camera on the building. Shoot the camera first and then kill both of soldiers. (Don't kill the one in right building area yet)
11. Use the zipline to swing to the second tower.
12. You need to be fast here. Zoom in on the two security cameras in front of you and then shoot the one looking on the camera that's looking away, and then immediately kill the soldier. You may need to wait a little to get the best moment.
13. Zoom in on the soldier walking outside the area of the two building and kill him.
14. Jump on the building in front of you and keep going forward to the gate with two Stop signs on it.
15. Unlock the gate with the computer in it's left and get on the truck in your left.