It's a bit like Subnautica but in a minimalist and linear way. You are on an aquatic planet where you discover for the first time life outside the earth. There are two characters, a human and an AI, the player is the AI and the goal is to help the human search for his partner who is supposedly lost on this planet.
The gameplay is unique and immersive while being very simplistic. It gives the same feeling of discovery of strange underwater creatures, but In Other Waters leaves room for imagination. However, the heart of the game is the well-written story and the lore you discover by scanning objects and reading analysis. It is more linear than Subnautica and there is quite a bit of text where you discover the mysteries of the planet.
It's a weird game that I wouldn't recommend to everyone, but if you want a relaxing sci-fi game, it might be worth a try.