Thalassa: Edge of the Abyss

First-person mystery adventure about the crew of a sunken ship

Sarepta Studio · Published by Team17 Digital Ltd · Released Aug 1, 2024

Reviews: Very Positive; 86% of 327
Recent reviews: Not enough recent
Players: 1; daily peak, Oct 28, 2026
Steam Deck: Verified
Last update on Steam: 1 year ago; Feb 18, 2025
Minimum PC: GeForce GTX 1050 Ti; 8 GB RAM · 30 GB disk; Full requirements

What is Thalassa: Edge of the Abyss?

Set in 1905, this single-player psychological adventure follows Cam, a diver investigating what happened aboard their former ship, Thalassa. You explore its wreck from a first-person perspective, examine clues, and find tools to clear blocked routes, while Bailey guides you from the surface.

For you if...

+you want a story centered on loss and grief

Not for you if...

−you want complex puzzles and open-ended investigations

What players say

86% of 327 reviews are positive

Players praise the writing, particularly the crew's relationships, and the underwater atmosphere. The most common complaints concern slow movement, repeated unskippable animations, and dialogue that interrupts play.

Screenshots and trailer

Thalassa: Edge of the Abyss screenshot 1

Thalassa: Edge of the Abyss system requirements

Minimum: GeForce GTX 1050 Ti, 8 GB RAM, 30 GB of disk space.

As published by the developer.

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Minimum

OS: Windows 10
Processor: Intel Core i5 4th Gen/ AMD Ryzen 3 4100 4 cores 3.8 GHz
Graphics: NVIDIA GeForce GTX 1050 Ti 4GB/ AMD R9 290 HD 4GB
Memory: 8 GB RAM
Storage: 30 GB available space

Does Thalassa: Edge of the Abyss have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Thalassa: Edge of the Abyss run on Steam Deck?

Verified Yes, Verified by Valve: it works on Steam Deck out of the box.

All functionality is accessible with the default controller configuration
Shows Steam Deck controller icons
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck
External controllers are not supported for the primary player

PC version details

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows
Achievements: 25
Steam features: Cloud saves, Family Sharing
Languages: Full audio: English. Text only: French, Italian, German, Spanish - Spain, Japanese, Korean, Norwegian, Russian, Simplified Chinese, Traditional Chinese.

Does Thalassa: Edge of the Abyss use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam