Thalassa: Edge of the Abyss

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App ID	1783680
App Type	Game
Developer	Sarepta Studio
Publisher	Team17 Digital Ltd
Franchise	Team17 Digital Ltd
Supported Systems	Windows
Technologies	Unreal Engine
Last Changenumber	30508008
Last Record Update	9 August 2025 – 17:34:29 UTC ()
Release Date	1 August 2024 – 15:58:16 UTC ()

❓ 81.58%

253 reviews

In-Game

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.

Additional Information

Developer

Sarepta Studio

controller_support

full

community_visible_stats

Yes

DLCAvailableOnStore

Yes

ReleaseState

released

Publisher

Team17 Digital Ltd

Store Release Date

1 August 2024 – 15:58:20 UTC ()

osarch

community_hub_visible

Yes

Social Media

https://discord.gg/4tysgGsrWA

Primary Genre

Indie (23)

Store Genres

Adventure (25), Indie (23), RPG (3)

Steam Release Date

1 August 2024 – 15:58:16 UTC ()

Store Asset Modification Time

18 February 2025 – 09:56:22 UTC () (1739872582)

library_assets

library_capsule	en,zh-tw
library_hero	en
library_logo	en,zh-tw
library_header	en
logo_position ↴
pinned_position	CenterCenter
width_pct	43.55179886116531
height_pct	100

osextended

empty string

review_score

review_percentage

Detected Technologies (?)

Unreal Engine, NVIDIA_APEX SDK, NVIDIA_Nsight_Aftermath SDK, NVIDIA_PhysX SDK, NvCloth SDK, Ogg SDK, Vorbis SDK, Wwise SDK, XAudio2 SDK, iZotope SDK

Steam Deck Compatibility

Steam Deck:
Some in-game text is small and may be difficult to read
This game requires manual configuration of graphics settings to perform well on Steam Deck
This game is incorrectly scaled on Steam Deck and may require you to configure the display resolution manually
All functionality is accessible when using the default controller configuration
This game shows Steam Deck controller icons
Note: This game does not default to external Bluetooth/USB controllers on Deck, and may require manually switching the active controller via the Quick Access Menu
SteamOS:
This game runs successfully on SteamOS
Note: This game is incorrectly scaled on SteamOS and may require you to configure the display resolution manually
Note: This game does not default to external Bluetooth/USB controllers on SteamOS, and may require manually switching the active controller via the Quick Access Menu
category: Playable
steamos_compatibility: Compatible
test_timestamp: 28 March 2025 – 00:00:00 UTC
tested_build_id: 15692779

configuration:

supported_input	gamepad
requires_manual_keyboard_invoke	0
requires_non_controller_launcher_nav	0
primary_player_is_controller_slot_0	1
non_deck_display_glyphs	0
small_text	1
requires_internet_for_setup	0
requires_internet_for_singleplayer	0
recommended_runtime	proton-9.0-4RC
requires_h264	0
requires_voice_files	0
gamescope_frame_limiter_not_supported	0
hdr_support	0

Content Descriptors

General Mature Content (5)

controllertagwizard

Yes

First seen on SteamDB

6 October 2021 – 13:51:06 UTC (), in changelist #12772673

Content Descriptors (Including DLC)

General Mature Content (5)

Supported Languages

11 Languages	Interface	Full Audio	Subtitles	Achievements
English	Yes	Yes	Yes	Yes
French	Yes		Yes	Yes
Italian	Yes		Yes	Yes
German	Yes		Yes	Yes
Spanish - Spain	Yes		Yes	Yes
Japanese	Yes		Yes	Yes
Korean	Yes		Yes	Yes
Norwegian	Yes		Yes	Yes
Russian	Yes		Yes	Yes
Simplified Chinese	Yes		Yes	Yes
Traditional Chinese	Yes		Yes	Yes

Hardware Categories

Full Controller Support

DualShock Controllers (USB Only)

DualSense Controllers (USB Only)

Assets

Load all asset images

clienticon

3eedf292741f7568bef1aae61a20ccadfc5315d1

clienttga

9028ca9d058edfe64bbf0ed28b6d49b0aa6f9e40

icon

481e8ced7661461e363057bbf8847a5b03e50c6c

small_capsule

english

capsule_231x87.jpg

header_image

english

header.jpg

library_assets_full

library_capsule ↴
image/english	library_600x900.jpg
image/tchinese	library_600x900_tchinese.jpg
image2x/english	library_600x900_2x.jpg
library_hero ↴
image/english	library_hero.jpg
image2x/english	library_hero_2x.jpg
library_logo ↴
image/english	logo.png
image/tchinese	logo_tchinese.png
logo_position/pinned_position	CenterCenter
logo_position/width_pct	43.55179886116531
logo_position/height_pct	100
image2x/english	logo_2x.png
image2x/tchinese	logo_tchinese_2x.png
library_header ↴
image/english	library_header.jpg

Assets

main_capsule	capsule_616x353.jpg
small_capsule	capsule_231x87.jpg
header	header.jpg
page_background	page_bg_generated_v6b.jpg
hero_capsule	hero_capsule.jpg
library_capsule	library_600x900.jpg
library_capsule_2x	library_600x900_2x.jpg
library_hero	library_hero.jpg
library_hero_2x	library_hero_2x.jpg
community_icon	481e8ced7661461e363057bbf8847a5b03e50c6c.jpg
page_background_path	app/1783680
raw_page_background	page_bg_raw.jpg
timestamp	18 February 2025 – 17:01:30 UTC

Trailers

257042472 ↴
trailer_name	Thalassa - Launch Trailer
trailer_category	1
trailer_480p/video/webm	257042472/movie480_vp9.webm
trailer_480p/video/mp4	257042472/movie480.mp4
trailer_max/video/webm	257042472/movie_max_vp9.webm
trailer_max/video/mp4	257042472/movie_max.mp4
microtrailer/video/webm	1783680/734029/09eaf1df7bdc785dac598eab0a3d13b4301279a8/1750735744/microtrailer.webm
microtrailer/video/mp4	1783680/734029/09eaf1df7bdc785dac598eab0a3d13b4301279a8/1750735744/microtrailer.mp4
screenshot_medium	257042472/movie.293x165.jpg
screenshot_full	257042472/movie_full.jpg
trailer_base_id	734029
all_ages	true
is_highlight	true
timestamp	1722520889
257042301 ↴
trailer_name	Chinese launch trailer
trailer_category	1
trailer_480p/video/webm	257042301/movie480_vp9.webm
trailer_480p/video/mp4	257042301/movie480.mp4
trailer_max/video/webm	257042301/movie_max_vp9.webm
trailer_max/video/mp4	257042301/movie_max.mp4
microtrailer/video/webm	1783680/733734/470acebef80fbd3ead3ecbdf89008887bbef56a5/1750735733/microtrailer.webm
microtrailer/video/mp4	1783680/733734/470acebef80fbd3ead3ecbdf89008887bbef56a5/1750735733/microtrailer.mp4
screenshot_medium	257042301/movie.293x165.jpg
screenshot_full	257042301/movie_full.jpg
trailer_base_id	733734
all_ages	true
is_highlight	true
timestamp	1722520894
257017206 ↴
trailer_name	Thalassa - Announce Trailer
trailer_category	0
trailer_480p/video/webm	257017206/movie480_vp9.webm
trailer_480p/video/mp4	257017206/movie480.mp4
trailer_max/video/webm	257017206/movie_max_vp9.webm
trailer_max/video/mp4	257017206/movie_max.mp4
microtrailer/video/webm	1783680/689633/c960622d108e3ad5fef4e660e3be516b02962906/1750735732/microtrailer.webm
microtrailer/video/mp4	1783680/689633/c960622d108e3ad5fef4e660e3be516b02962906/1750735732/microtrailer.mp4
screenshot_medium	257017206/movie.293x165.jpg
screenshot_full	257017206/movie_full.jpg
trailer_base_id	689633
all_ages	true
is_highlight	true
timestamp	1718957474

Depots

ID	Configuration	Size	DL.
228988	Windows Shared InstallDepot from 228980VC 2019 Redist	No size
228990	Windows Shared InstallDepot from 228980DirectX Jun 2010 Redist	No size
1783681		24.79 GiB	9.29 GiB
3003371	DLC 3003370Thalassa: Edge of the Abyss - Deluxe Edition Upgrade	621.47 MiB	324.48 MiB

Total size on disk is 25.40 GiB and total download size is 9.61 GiB.

Total size on disk is 24.79 GiB and total download size is 9.29 GiB, when filtered to Windows, English, no DLC depots.

Branches

Name	Description	Build ID	Time Updated
public		17410520	18 February 2025 – 17:04:33 UTC

Other

Name	Value
baselanguages	English, German, French, Italian, Korean, Spanish - Spain, Simplified Chinese, Traditional Chinese, Russian, Japanese, Norwegian
hasdepotsindlc	0
privatebranches	1

Thalassa: Edge of the Abyss

Additional Information

Supported Languages

Tags

Categories

Hardware Categories

Assets

Depots

Branches

Other