Single-player games like Sonorous | Deep Down Below
Below are 8 single-player Steam games similar to Sonorous | Deep Down Below, 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 Sonorous | Deep Down Below page.
Ranked picks
- 1
Full Fathom
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Action and Indie with Sonorous | Deep Down Below.
Full Fathom is an oceanic survival horror game. Pilot a deteriorating submarine as it drifts through grim waters, keeping it maintained as it is your only lifeline in the hostile, merciless ocean.
- 2
I Thalassa
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Adventure with Sonorous | Deep Down Below.
You are not the goddess, you are her dumbest duck. Explore a biomechanical alien ocean, pilot real submarines, and recover the scattered pieces of a dead creator to help Thalassa, your grieving machine-goddess, bring her father back.
- 3
Aquarift
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Indie and Adventure with Sonorous | Deep Down Below.
Survive in a harsh underwater environment filled with mysterious and aggressive fauna. Gather resources, build bases, and craft equipment to explore an underwater alien world! Swim through interconnected biomes in a metroidvania style.
- 4
The Deep
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Indie with Sonorous | Deep Down Below.
Explore the vast underwater world as one of the four divers on a mission. Build your base, grow plants, and craft items to survive. Upgrade your gear, scavenge for resources, and uncover the secrets of the alien planet in this survival game.
- 5
Plasticalypse - Submarine Adventures
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Action and Adventure with Sonorous | Deep Down Below.
A journey of the last ocean cleaner submarine that is tasked to restore the ecosystem of a dying earth. "Plasticalypse: TrashSub Adventures“
- 6
DISTANT VISITANT
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Action and Indie with Sonorous | Deep Down Below.
Survive the alien arrival in DISTANT VISITANT, a top-down open-world sandbox. Master talents from marksmanship to cooking while managing hygiene and hydration. Adapt to seasons where winter freezes crops and lakes. Craft, build, hunt, and find survivors. Prepare for them, this is just the start.
- 7
Insiders
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Action and Indie with Sonorous | Deep Down Below.
Welcome to the dangerous micro world hidden inside the human body. Pilot an advanced microship through the bloodstream, brain and kidneys. Mine resources, fight microbes, craft ship modules and weapons, build bases, discover new microorganisms and find a cure for cancer. Don’t get eaten!
- 8
Big Fish
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Action and Indie with Sonorous | Deep Down Below.
Explore an underwater dystopian graveyard of giant creatures that once swam the seas. Eat your way to the top of the food chain and grow into a powerful creature of the deep in order to restore an ancient technology and save the ocean from the sunken city's pollution.