Skip to main content

No ads. Ever. Help keep it that way. →

Loading games like…

Loading the shelf…

About
FAQ
News

Privacy Policy Terms of Service

© IndieDex. All rights reserved.

Search Backlog Lists Following Profile

Games like Sub Optimal Co. | IndieDex

Sub Optimal Co.
Games like Sub Optimal Co.

Find the Steam hidden gems

multi-players with secrets you find without a guideor

Games like Sub Optimal Co.

A slow, atmospheric submarine sim about carefully navigating tight caves to collect targets, playable solo or in co-op.

FULL METAL COFFIN
A fast-paced 3D co-op submarine simulator where up to four players crew a vessel, load torpedoes, dodge fire, and sink enemies in short, teamwork-heavy sessions.
2026-06-24
- First person
- Science fiction

Horror

Survival

Indie

Drama

Auditory

Submorse cover art

Submorse

A short, atmospheric first-person submarine game that teaches Morse code in a chill, casual way.

2021-03-31

Indie

Subterror cover art

Subterror

Explore ocean-floor biospheres alone or with friends in this compact co-op action-adventure.

2025-01-03

Action
First person
Adventure
Horror
Indie

Darkwater cover art

Darkwater

Co-op extraction horror on an alien ice planet: pilot a submarine, fight abominations, and scavenge to survive — fun with friends but a bit flat, with roughly 4-6 hours of reviewer playtime.

2026-03-26

Action
Adventure
Strategy
Indie
Role-playing (RPG)

Iron Lung cover art

Iron Lung

A brief horror game on an alien moon, guiding a tiny submarine through a blood ocean via instrument panels, with a ~2-hour runtime and a tense, oppressive mood.

2022-03-09

First person
Science fiction
Puzzle
Adventure
Horror
Indie
Simulator

Murky Divers cover art

Murky Divers

Co-op underwater lab cleanup: pilot a submarine, dodge abyssal terrors, and dispose of corpses solo or with up to 7 friends.

2024-12-12

Action
First person
Adventure
Horror
Indie

Barotrauma cover art

Barotrauma

Tense 2D co-op submarine survival sim on an alien ocean, with crew management, monster fights, and leak-fixing chaos — a long-haul multiplayer experience.

2023-03-13

Action
Science fiction
Adventure
Horror
Survival
Strategy
Indie
Side view
Simulator

subROV : Underwater Discoveries cover art

subROV : Underwater Discoveries

A single-player ROV exploration sim of dark deep-sea charting and species study, with a calm pace and roughly seven hours of content.

2022-12-02

Adventure
Indie
Simulator

The Hull cover art

The Hull

A short, tense underwater descent game with solo and co-op play, procedural dungeon runs, and extraction-based survival, completed in roughly three hours.

2026-02-12

Shooter
Action
First person
Horror
Indie

Debris cover art

Debris

A short, atmospheric co-op narrative adventure about exploring a mysterious underwater seascape and escaping together.

2017-10-23

Action
First person
Thriller
Adventure
Survival
Strategy
Indie
Simulator
Mystery
Drama

Sync Or Sink cover art

Sync Or Sink

A short two-player co-op submarine escape game centered on walkie-talkie communication and on-the-fly puzzle solving, with rough early-access edges.

2025-10-01

Action
Adventure
Indie

Dread Not cover art

Dread Not

An asymmetrical underwater co-op horror game where Pilot and Mechanic teammates repair, solve puzzles, and escape a creature before a timer runs out.

2025-06-14

First person
Puzzle
Horror
Indie