
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
progression depends on obscure clue hunting with very little guidance it becomes frustrating instead of fun i was literally 10 minutes into the game i got so angry at this game my controler flew across the room
Very fun game! Good story and mystery.
This is a rather engrossing game of mystery/investigation/exploration woven into a rather deep and somewhat emotional story regarding tragedy. The gameplay itself reasonably good, maybe curated/guided a wee bit too much, and the slowness of the movement is understandable given the environment but can be a little annoying at times. Overall very glad I bought and played this game...it's one of those games you'll think about for a while after you've finished it...
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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
Good story, great charecters
First off, I have to say "damn, what a good story. I picked this game up recently and was surprised that I hadn't heard of it until now. Although a bit linear, the storyline really tugs at your heart and mind. Seeing the mysteries unfold and how they are all connected after a tragedy provided some excellent storytelling I haven't seen in a long time. I would highly recommend this game to anyone who likes emotionally involved puzzle/mystery games.
Overall I enjoyed Thalassa. The gameplay is a bit simple, other reviews call it a walking sim, and I can certainly see why some people would think that. A lot of the gameplay consists of moving around the environment, and either opening doors/pathways, or interacting with clues. Beyond that is solving the mysteries, where you must choose the correct clues to fit the solution, [spoiler]except for the final mystery, where you must give a solution you already know is wrong to continue, I think it has to do with the player character refusing to accept the whole this was essentially an accident, no one to blame.[/spoiler] I am always on the look for good mystery games, especially maritime mysteries, so this scratched that itch pretty well. The ending was also pretty solid. There is one anachronism that bothered me, from the moment I saw it, even though it is basically meaningless. The game takes place in 1905, and in the galley you see a menu, where the meal for one of the days is Tikka Masala. I was curious as to whether this was a thing at this time, and sure enough, it was not. Tikka Masala as it is currently known came about from some chef in Scotland in the 1960s. Inspired by other dishes, so its possible, even likely, that Tikka Masala in some form existed in 1905, but not by that name. It ultimately doesn't matter whatsoever, but I was curious, looked it up, and have no one to share it with, so I'm putting it here.
Well written story with good interpersonal relationships. Game is slowed down a bit unnecessarily by slow player movement and animations.
güzel
故事很好,解谜很简单,主要就是跟着流程看完整个故事。缺点是优化很差,门窗的边角会有白边,有时场景加载不出来,不清晰的画面但帧率很低不知道哪里在吃配置
Thalassa hat mir wirklich sehr gut gefallen. Es gibt eine Menge zu entdecken. Die Charaktere sind alle auf ihre eigene Art uns Weise besonders. Zeitweise fand ich das Game sehr emotional, da es viel von Verlust, Leben und Ängsten handelt und hatte doch eine Träne in den Augen, als ich es beendet habe. Für mich war es durchweg interessant, die Rätsel nicht zu schwer und es hat einfach auch wahnsinnig Spaß gemacht das Schiff zu erkunden und mehr über die Charaktere zu erfahren und letztendlich auch zu erfahren was wirklich mit der Besatzung passiert ist.
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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