Tomb Raider: Underworld - [Secrets] Arctic Sea – Helheim - part 1 - game guide, walkthrough, secrets, game tips & strategies

[150] In the ditch separating the fortress from the statues.

[151] In the ditch separating the fortress from the statues. In the cave which is located opposite the big skeleton.

[152] In the ditch separating the fortress from the statues. At the opposite end of [150].

[153] Inside the destroyed statue, in front of the fortress.

[154] On the left side of the fortress, on its lower level, near the big skeleton.

[155] On the lower level of the fortress, on its right side.

[156] Behind two devices. On the right from main entrance to the fortress which is collapsed.

[157] Swim inside the flooded corridor on the left side of the fortress. Swim to the second bend and turn right there. You will find yourself at the backs of rubble blocking the main entrance.

[158] In the corridor on the left side of the fortress, in the flooded room with key of the power.

[159] Just after swimming out of the place where you found [158], move to the top. On the right side you will find the treasure.

[160] In the flooded room, opposite the place where you found [159].

[161] On the top of the tower, on the left side of the fortress, in the room with the key of force.

[162] On the first floor of tower, on the right side of the fortress.

[163] [164] On the top of the tower, on the right side of the fortress, in the room with the key of force.

[165] Behind the damaged window, above the device which can be activated with the key of force, on the right from the main entrance to the fortress.