
Uncover the mystery of Thalassa, a first-person psychological drama set under the sea. Ill-fate has fallen on your former crew and friends and it’s up to you to find answers onboard the wreckage. Experience the melancholic underwater journey of human stories facing life and loss.
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About
Thalassa is a single player, first person psychological drama set in 1905. You play as Cam, a deep sea diver in a crew of adventurers and pioneers aboard Thalassa. As you prepare to raise a long-forgotten Spanish galleon from the ocean, what should be a great day for history takes a turn for the worst.
Upon needing to take some time to heal from the event, you discover Thalassa has met a mysterious and unfortunate end. Your former crew mates are gone, and you'll need to descend into the depths to board the ship once more. Alone in the ocean, with your diving support Bailey guiding you from the surface, it's up to you to piece together the clues left behind in the wreckage and discover what really happened in the final moments onboard the ship.
Immerse yourself in an atmospheric story of self-discovery and sorrow onboard Thalassa.

Discover a story that delves into the complexities of human emotions and interactions, and learn about the intricate relationships between your crew members. You'll uncover the personal struggles of each member of Thalassa's crew and how grief can be experienced in different ways. Loss takes its toll in many shapes and forms, while life marches on.

As the only diver left in the crew, it's up to you to return to Thalassa, now in its final resting place on the seabed. Navigate your way through the strange, but beautiful surroundings and discover the clues that will help you unravel the events leading up to the disaster.

Experience the calm and isolation of deep-sea exploration as you navigate through debris of the shipwreck. In order to continue exploring the ship, you'll have to find the right tools to help unblock the obstructions in your path.
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English*, French, Italian, German, Spanish - Spain, Japanese, Korean, Norwegian, Russian, Simplified Chinese, Traditional Chinese*languages with full audio support
Engagement
Hours played at review time, across 44 reviews with recorded playtime.
Reviews
Themes across 43 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
positive critical· bar length = how often the theme comes up
Reviews
It was fun, although slow movement. Fun little mystery game under water
Muy contemplativo y bonito, el movimiento y velocidad de juego se siente como estar bajo el mar. No va a ser un paseo rápido por el barco. El diseño del Thalassa es muy bueno.
Slow going but all the better for it I think. I did enjoy this experience.
I loved this game. Its a shame it has not sold as much as it deserves. Great story, production values and voice acting.
It's strange, because on the one hand I found the gameplay frustratingly slow and unintuitive, and I had to suspend all disbelief to accept the story. On the other hand, it was a very unique game and setting, and two weeks after I played it, I still find myself thinking about it. So, it's one of those [i]"if you think it might be interesting to you, it probably will be"[/i] recommendations.
Hidden gem.
Сильна ємоційна історія про життя, втрату та пошук правди. Пейзажі затонулого корабля неймовірні, інколи на локаціях відчуваєш спокій, а інколи напругу. Розповідь через спогади, дослідження, читання записів, щоб скласти картину того, що ж сталось. Атмосферна, меланхолійна, задумлива, захоплива - ось що можна про неї сказати.
It was a neat little mystery story-teller. The story was captivating, the mystery-solving aspect was fun. I like the environment and setting, the ship was beautiful, the characters all had depth to them. A few oddities were that the dialogue between any two characters felt a little awkward. There were long pauses and a weird pace to conversation and flow. During recreations of "what happened" it would have been nice if there were more ambient sounds and foley when characters moved around. My only true dislike was at times it felt like the clues to solving some mysteries really didn't make sense or easy to conclude. Overall though, good game, worth 10 hours. In the end I chose to [spoiler] leave Alex behind. [/spoiler]
Very much enjoyed this, though I do agree with the criticisms of the pacing and amount of backtracking. Even with those issues though, I did very much enjoy just being in the scene and unearthing the events. It did strike me as odd that the main protagonist isn't voiced, I think this is an oversight that would be worth fixing, but if you like things which are essentially an interactive film, then you'll probably enjoy this.
Devastating, beautiful, and the story keeps you hooked. I cried.
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Trends
Modeled estimate over time, reconstructed from Steam's monthly review histogram.
Momentum
Pace estimated from the game's recent review growth (our daily snapshots) at its own sales-per-review ratio — a momentum signal, not booked sales.
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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