
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.
Modeled estimate, not a reported figure. How we estimate →
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 0.14/day in the week to Jul 30 → 0.29/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 26 chart moves that followed a price cut of more than 20% went a median of 7 places towards #1, and the 2,400 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
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.
Engagement
Reviews
Themes across 59 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
výborná hra. 9/10
This is a great game with lots of story to offer. Would recommend to anyone who enjoys story and exploration. the game is not game play focused (more walking sim), but it doesnt pull its punches
A neat mystery game that explores the topics of loss and grief. Not a horror game, but the isolation can still feel oppressive (in a thematic way that aids in the expression of the main themes of the story).
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Genres
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
Hours played at review time, across 61 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
I very much like the game and the story. Would definitely recommend it.
Nessun tipo di azione, nessuna avventura particolare se non svelare un mistero. Un detective subacqueo. Molto bello. Atmosfera resa perfettamente.
Thalassa erzählt eine Geschichte und es reißt einen irgendwie mit. Die Interaktion mit Gegenständen könnte etwas "schneller" sein ansonsten finde ich das Dingt echt gut.
A bittersweet and deeply human tale. Highly recommended.
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]
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'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.
Players by region
Where this game's players are, estimated from review languages.
Players also reviewed
The games this title's players most often review too — audience affinity.
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