Single-player games like Dark of the Depths
Below are 8 single-player Steam games similar to Dark of the Depths, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Dark of the Depths page.
Ranked picks
- 1

7821 Akuji
Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.
7821 Akuji is a first person liminal horror experience. Pilot a tiny, jury-rigged submersible to rescue a lost science crew.
- 2

Ocean Pressure
Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.
Ocean Pressure is a singleplayer game where you as an old scientist piloting your handmade submarine in the bottom of the ocean. Your mission is explore the ocean and collect required data with help of your submarine.
- 3

subROV : Underwater Discoveries
Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.
Pilot a remotely operated submarine and explore the oceans! Defy the darkness and crushing pressure of the deeps as you chart unknown regions and study new species of ocean life.
- 4

It Sleeps Below the Haar
Single-player alternative to Dark of the Depths — playable solo, no multiplayer required.
A short exploration game, set in a secluded coastal village in North East Scotland. Explore Kellas Bay and it's surrounding forests, caves and ocean to uncover what lies beneath the fog-covered village.
- 5

Submergent
Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.
Explore and navigate an underwater cave in your submarine.
- 6

Submarine VR
Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.
Submarine VR takes you on a adventure-filled underwater simulation experience! Dive deep and cruise through the endless uncharted nature of the ocean and you will see clownfish, dolphins, penguins and mysterious sea animals. Get close to the sea surface and sail in the open sea with your cruise ship
- 7

Behind Glass: Aquarium Simulator
Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.
Create stunning virtual aquariums on your PC! Our advanced 3D engine brings your fish tank to life with breathtaking realism, featuring lifelike fish, plants, decorations, and more. Transform your monitor into a vibrant, living aquarium. Virtual aquascaping has never been easier!
- 8

СИМУЛЯТОР ЛАЗАНЬЯ ПО ЗАБРОШКАМ
Single-player alternative to Dark of the Depths — playable solo, no multiplayer required. Shares Simulation with Dark of the Depths.
At its core, it's not really a game. Rather, a short tour of the authentic post-Soviet courtyard, which has long been abandoned by local residents.