Abyss of Neptune

Abyss of Neptune

Released Apr 2021

Abyss of Neptune is a survival horror game set in the deep seas of the Bermuda Triangle. You are sent to investigate a mysterious underwater signal, but there is more to it than meets the eye. Do you have what it takes to survive the abyss?

69% positive · 230 reviews
Done
All announced content has been released
High confidence
Done
All announced content has been released
High confidence

Where to get it

Free on Steam

Evaluation

Abyss of Neptune launched on April 26, 2021. The developer posted a patch shortly after launch on May 1, 2021 addressing early player feedback, followed by a Version 1.0 update on March 22, 2022 that added Spanish localization, difficulty modes, accessibility improvements, and bug fixes. That Version 1.0 post represents the game reaching its fully shipped state. Since then — over four years ago — there have been no further developer communications, no announced DLC or expansions, no roadmap, and no store-listed future content. The store description makes no mention of planned updates or additional content. With no outstanding commitments and no post-1.0 content releases of any kind, this game launched and completed as a self-contained, finished product.
Evidence
Version 1.0 update shipped, adding Spanish translation, difficulty modes, overhauled settings, new controls options, and bug fixes — marking the game's full release state.
news post · Mar 22, 2022 source content shipped
high
Patch 0.9.1.0 released shortly after launch, addressing player feedback with quality settings, movement improvements, and bug fixes.
news post · May 1, 2021 source content shipped
medium

Media

Details

Developer
Publisher
Synodic Arc
Achievements
12
Platform
Windows
Controller
full support
Steam Deck
Not rated
Players
Single-player

About this game

From the creators of The Book of Regrets, Synodic Arc teams up with Abyssmal Games to create an underwater survival horror game. Set in the depths of the Bermuda Triangle, you are sent by D.I.V.E.S (Divers Investigating Various External Signals), a government-funded organization, to investigate a mysterious underwater signal. Are you ready to traverse the treacherous abyss and make it back alive?

Survival Horror

Explore the abyss and evade what lurks in its depths. Hide or fight your way out of every encounter against gruesome creatures.

Puzzles

Solve a myriad of puzzles to learn more about what led to the mysterious signal. What led to the events that transpired here?

Underwater

Utilize your D.I.V.E.S. suit to traverse an underwater environment. Make use of your jet booster, flashlight, and gadgets to scavenge the ocean.
Last evaluated Jun 23, 2026
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