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Thalassa: Edge of the Abyss

Thalassa: Edge of the Abyss

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.

Released Aug 1, 2024 Developer Sarepta Studio Publisher Team17 Digital Ltd Platforms Windows AdventureInteractive FictionFirst-PersonAtmosphericEmotional
View on Steam ↗ $9.99 (US · as of 2026-09-25)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-02 · quoted reviews as of 2026-05-15.

88.9%positive368 reviews
Recommended · 1 found this helpful

“This game has an amazing story. It is dark and weighty but I did not feel it was for shock value and by the end it feels really...normal but in a meaningful way. I think a lot of it is the mental state of Cam and his grief. Other reviews have talked about the monotony and the…”

— a player, Steam review · 7 hrs played
Recommended · 1 found this helpful

“It was fun, although slow movement. Fun little mystery game under water”

— a player, Steam review · 7 hrs played
Not recommended · 19 found this helpful

“This game is mercilessly on rails and is not really a puzzle game, the only agency you have is in walking on those rails back and forth. The repetitive and painfully slow UNSKIPPABLE animations easily doubled the playtime to help it pretend there was more substance here than…”

— a player, Steam review · 12 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-07 via SteamCharts.

73all-time peak
0 10 20 2025 2026 No data collected for this period No data collected for this period No data collected for this period No data collected for this period 16 avg · Aug 2024

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-19.

25achievements
45.2%median completion
3.1%rarest: Heartless
72.7% of players 67.1% of players 67.0% of players 57.3% of players 56.6% of players 53.4% of players 52.6% of players 50.4% of players 49.0% of players 47.8% of players 46.0% of players 45.7% of players 45.2% of players 43.4% of players 43.3% of players 42.6% of players 42.5% of players 42.3% of players 40.1% of players 38.4% of players 37.7% of players 30.7% of players 12.8% of players 12.0% of players 3.1% of players 72.7% 0% most earned rarest
Almost everyone has
72.7%The Dive — Complete the prologue
67.1%Curiosity — Open the sunken drawer before getting to the Thalassa
67.0%Welcome home — Return to the Thalassa
Rarest badges of honor
3.1%Heartless — Hidden achievement
12.0%Chained by grief — Hidden achievement
12.8%Nautical Nomad — Visit all areas on the Thalassa

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-08-12. Steam prices vary by region — always confirm your local price on Steam.

$9.99−50% right nowcurrent · sampled 2026-09-25 21:36 UTC
$19.99base price
$9.99lowest since tracking began2026-09-17
US9.99 USD−50%
EU9.99 EUR−50%
UK9.99 GBP−50%
Australia14.75 AUD−50%
Canada12.99 CAD−50%
Japan1,150 JPY−50%
Brazil35.99 BRL−50%
China46.00 CNY−50%

Regional prices at last sample, in local currency — Steam sets each region's price independently.

China≈$6.9 Brazil Japan Canada US Australia EU UK≈$13

Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-25). Relative comparison only.

$0 $25 $50 08-12 08-21 08-30 09-08 09-16 09-25

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Jan 12, 2026
Thalassa: Edge of the Abyss Deluxe Edition 50% OFF in Steam Detective Fest🕵️🌊

Hey all! 👋 We're thrilled to be a part of Steam Detective Fest and to celebrate, Thalassa: Edge of the Abyss Deluxe Edition is currently 50% OFF until January 19th! Can you piece together the clues le

Feb 22, 2025
MiniDoc 1 & 2 | Intro to the Art of Thalassa

Creating the universe of Thalassa and approaching harder-to-digest topics with delicacy has been the biggest mission of Sarepta Studio for the past 6 years. Game Designer Catharina Boehler gives glimp

Feb 18, 2025
Deluxe Edition now available featuring Art Book, Comic and 3D Printer Files!

Take a deeper look into how Thalassa the ship was created, how each character represents little pieces of real world, and the stylistic details of the underwater experience that tethers realism and fa

Nov 29, 2024
Nominate Thalassa: Edge of the Abyss in the Steam Awards 2024!

Hey all! It's that time of the year- the Steam Awards 2024 are here! Steam is currently inviting players to nominate their favourite game within a specific award category. We're proud of Thalassa's st

Sep 18, 2024
Patch 1 - Out Now I Thalassa: Edge of the Abyss

Hey all! 👋 Today, we have rolled out Patch 1 for Thalassa: Edge of the Abyss . Our first patch contains adjustments to Thalassa's audio mix, fixes to a handful of community-reported bugs and more! Sin

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From our knowledge graph — ranked by shared traits, not a black box. Each card says why it's here.

Layers of Fear Layers of Fear 75.9% · 706 reviews shares Immersive, Narrative, Emotional, Interactive Fiction Before Your Eyes Before Your Eyes 98.3% · 16,515 reviews shares Narrative, Psychological, Emotional, Drama Contradiction: Spot The Liar Contradiction: Spot The Liar 95.3% · 2,854 reviews shares Immersive, Detective, Interactive Fiction, Mystery Gone Home Gone Home 77.1% · 14,687 reviews shares Narrative, Emotional, Interactive Fiction, Mystery The Novelist The Novelist 75.5% · 853 reviews shares Psychological, Emotional, Drama, Interactive Fiction Draugen Draugen 72.0% · 1,114 reviews shares Detective, Emotional, Drama, Mystery SCP: Secret Files SCP: Secret Files 82.9% · 1,863 reviews shares Emotional, Drama, Mystery, First Person SEASON: A letter to the future SEASON: A letter to the future 94.6% · 923 reviews shares Narrative, Emotional, Drama, Interactive Fiction

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-05-15.

GenresAdventure, Indie, RPG
Player tagsAdventure · Interactive Fiction · First-Person · Atmospheric · Emotional · Psychological · Singleplayer · Story Rich · Indie · Exploration · RPG · Underwater (SteamSpy community voting)
FeaturesSingle-player · Steam Achievements · Full controller support · Steam Cloud · Family Sharing
LanguagesEnglish * , French, Italian, German, Spanish - Spain, Japanese, Korean, Norwegian, Russian, Simplified Chinese, Traditional Chinese *
ControllerFull support
Achievements25
Official sitehttps://thalassagame.com
Minimum system requirements (PC)

Minimum: Requires a 64-bit processor and operating system OS: Windows 10 Processor: Intel Core i5 4th Gen/ AMD Ryzen 3 4100 4 cores 3.8 GHz Memory: 8 GB RAM Graphics: NVIDIA GeForce GTX 1050 Ti 4GB/ AMD R9 290 HD 4GB Storage: 30 GB available space