After you initiate the first grate, keep to the left wall.
You should be able to locate a small hole.
Leave your vehicle and swim inside.
After a while, you will reach a room with the items inside.
Next to the mechanism for raising water level, on the barrel.
After you raise the water levels, return and swim through the second turbine.

Then, along the big pipe on the left.
On the left, find a room with a golden lamp inside.
Right after the water level raises, backtrack and swim through the second turbine.

On the right, on the underground elevation, there is a golden ladle.
On the upper floor, there iscode 3:3.
Inside, there is a statue.

After you have unlocked passage with the naval mine, enter the tunnel and turn left immediately.
Next to the barrier, on the crates, there iscode 3:4.
There, you will find the door that you could open by picking the lock.

Inside, there is a statue.
After you have unlocked the passage with the mine.
Remember that you better release two mines that are side-by-side.
There, on the self at the door, there iscode 3:5.
After you come out of water, after the action with the mine.
After you find Enigma Code 5, in the room on the ground, there is a golden necklace.
After you spot two officers, under the catwalk, next to the train, there iscode 3:7.
After you kill the two officers, inside, between gates 1 and 2, there iscode 3:8.
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