Sunless Sea: Zubmariner Edition

The infamous “Eye” seen in the game’s promotional material, a Zee Captain has a 20% chance of coming across it during their adventures. Specifically, it appears on a blank tile that spawns near the southern portion of the Unterzee - highlighted in green on the map in the following link:

https://gamepedia.cursecdn.com/sunlesssea_gamepedia/4/43/Map...

If the tile isn’t present, you’ll need to start a new captain and search this area until you get the desired tile. Once you do, search for a small, lone island (usually in the northwestern corner) and the eye will be just to the north. The achievement will unlock when you approach the Eye.