Sea of Solitude
22 Achievements
1,000
5-6h
Mermaid
Swam a very long distance Details for this achievement will be revealed once unlocked
90
2.69%
How to unlock the Mermaid achievement in Sea of Solitude - Definitive Guide
The best places to do are in areas free of the Whale so you don't have to worry about getting outside the safety border. 2 of the easiest spots are as follow:
CHAPTER 4 - HIDING After getting back on the boat from the end of chapter 3 you can leave it and swin around as the daylight is not restricted to it (just don't get too close to Sunny).
CHAPTER 11 - SOLITUDE Another good spot but requiring you to have finished the game. As the chapter is loaded head back to the cliff and jump into the water. It's always sunny so just swin in circles around the island and after some laps it will pop.
This chapter is also a great place for getting your 20 deaths by the whale monster.
In this game, there are two types of locations: sunny locations and ones shrouded in darkness. The ones shrouded in darkness will have a whale swimming around and will risk you getting eaten if you stay in the water for too long. In the sunny locations, you can swim around freely without worrying about getting eaten. The best way to get this trophy is to find a sunny area and swim around in circles. You will have many opportunities throughout the story to earn this trophy. If you have already completed the story, you can use chapter select. The exact distance required is unknown but it should take around 3-4 minutes of continuous swimming.