Sub Optimal Co.

It's A Sidegame · 2026-03-17

It's A Sidegame · 2026Loading price…

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

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Player reviews

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

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

2021-03-31

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

2025-01-03