Battlefield 4
67 Achievements
1,600
59-73h
Dirty Job
Find the hidden tunnel in Caspian Border
20
How to unlock the Dirty Job achievement in Battlefield 4 - Definitive Guide
EDIT: Apparently you must be the first person through the tunnel for this to unlock. So get some fast transport and get to D flag as quickly as you can to earn the achievement. Thanks I Spiritus I for heads up.
After multiple attempts, i think i figured it out.
(3) requirements
#1.You have to do this in a match.
#2. I believe that the "levolution" event in Caspian Border cannot have been triggered, meaning, the tower needs to be still standing.
#3. The gate at the end/beginning of the tunnel (depending on which way you're entering it from) needs to be broken by YOU as well.
Good luck, and get to that tunnel/gate fast!
requirements are not necessary
only conclusion i can see is you must enter from the river.
note: not sure if timer to take down tower had started.
I don't think the levolution had been triggered.
Play a large scale game on Caspian Border, like Conquest, and head to point D.
To simplify this you'll want to do a server search so you can find only games on this map.
There's a lake around one side and a barely visible pipe in the water.
Dive at the pipe and swim through. You'll get the trophy at the other end after a bit of running (It's not too far at all).
If you want to see the pipe then here's a decent video walkthrough:
There’s a hidden tunnel in the river that runs between C and D flag (B and C flag on the PS3 a.k.a. Conquest Small version). Dive underneath the water by pressing to get through the tunnel entrance and then dive up. Once in the tunnel, the trophy will pop. See the video below showing the exact location of the tunnel (at around 0:50 min).
Credit to Harry94_ for the video.
Alternatively, you can simply enter the tunnel from the other side, the entrances being the tall, green tower and a building next to it at D flag (C flag on the PS3). Thanks to AlphaCookie for the tip.
The tunnel is located underground, below the D flag (Hilltop) in Conquest. Enter the main small building on hilltop, go down the stairs into the room with the laptop where you’re able to trigger the tower levolution event (but do not trigger it) and you will see behind some boxes a vent. Knife through both fences of the vent, go down the ladder, sprint to the exit where you will swim out from under and end up in front of the Forest flag. The achievement will unlock once you’re in the water.
This can be done in either Rush, Conquest or Capture the Flag and the game must have at least 4 players present, this cannot be done in pre-game or alone. The achievement will only unlock for the first person in the match to enter the tunnel which makes this quite difficult. Also, the levolution event cannot have happened at the time of entering the tunnel, if the tower has fallen then the achievement will not unlock.
The video below shows how to go through the tunnel by entering under water from the exit.