Single-player games like Depths of Sanity
Below are 12 single-player Steam games similar to Depths of Sanity, 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 Depths of Sanity page.
Ranked picks
- 1
Seal The Breach
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Indie and Adventure with Depths of Sanity.
A 3D survival experience set within a cramped one-man submarine exploring a hostile ocean trench.
- 2
Fathoms
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Action and Indie with Depths of Sanity.
Hop into a ship and escape! With the help of an aquatic ally, you pilot an underwater vessel in an attempt to escape the clutches of the Sea Intelligence Bureau.
- 3
Static Dread: The Submarine
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Indie and Adventure with Depths of Sanity.
Descend into Lovecraftian horror aboard a claustrophobic military submarine. Assign tasks as a captain’s right hand, analyze sonar signals, make hard decisions, and keep the crew from madness. Dark horrors lurk both within… and beyond the hull.
- 4
The Kaiyo Mission
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Indie and Adventure with Depths of Sanity.
Control a submarine or a diver into the depths of unknown underwater worlds and take photographs of alien animals, plants and artefacts. Continue your journey through this casual, side-scroller, exploration game and collect stars to unlock more secrets before travelling to an alien home planet.
- 5
Remnants of R'lyeh
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Action and Indie with Depths of Sanity.
Inspired by H.P. Lovecraft's Great Work. An ancient dark power is calling you and you need to find an exit. Face your greatest fear, fight, hide... you must escape before the underwater city rises...
- 6
We Need To Go Deeper
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Action and Indie with Depths of Sanity.
DIVE. DISCOVER. DIE. Crew a submarine with friends in We Need To Go Deeper - a 2-4-player cooperative submarine roguelike set in a Verne-inspired undersea universe.
- 7
Iron Lung
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Indie and Adventure with Depths of Sanity.
A short horror game where you pilot a tiny submarine through an ocean of blood on an alien moon.
- 8
The Shore
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Action and Indie with Depths of Sanity.
THE SHORE is a first person story driven game with an atmospheric environment and narrations, You will encounter mysterious creatures and unravel the secrets behind them. Strong elements of horror, struggle to survive an unknown world that will make you question your own sanity.
- 9
Song of the Deep
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Adventure with Depths of Sanity.
From the creators of Ratchet & Clank, Song of the Deep is a metroidvania-style action-adventure game following a young girl’s quest into the unknown to find her missing father. It combines underwater discovery, skill, and suspense with a powerful story.
- 10
Pronty
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Action and Indie with Depths of Sanity.
Guide Pronty and its Javelin partner Bront as it defends the once great city of Royla. Explore the deep sea, fight mutant sea creatures, and discover the secrets behind this new Atlantis in this beautiful action-packed adventure.
- 11
Axiom Verge
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Action and Indie with Depths of Sanity.
Explore and uncover the mystery of a surreal alien world by blasting aliens and glitching your environment in this intense retro side-scrolling action/adventure.
- 12
Ballistick
Single-player alternative to Depths of Sanity — playable solo, no multiplayer required. Shares Action and Indie with Depths of Sanity.
The stick figure days are back! Ballistick combines tactical combat, over-the-top gore, and realistic gun mechanics to create an experience like no other. Lock, load, and get ready to relive the glory days of stick figure combat.