Arctic Explorer Trophy in Abzu
Discover the polar region.
How to unlock Arctic Explorer
This trophy is obtained during Chapter 7.
This trophy will be obtained near the end of the game at the area where you are able to ride the blue whales. Once you get to this area, turn left and you will see a little piece of ice. Swim over towards it and climb on top of the piece of ice. Collect the secret shell on the ice and your trophy will unlock.
Refer to the video below for the location of the polar region: