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
I Thalassa
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Adventure with Sonorous | Deep Down Below.
Immerse yourself in an alien ocean in this open-world survival game. Explore the biomechanical depths, tame alien creatures, pilot submarines, and uncover the mysteries of the alien entity known as Thalassa.
- 2
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.
- 3
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“
- 4
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!
- 5
Kalit
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Action and Indie with Sonorous | Deep Down Below.
A unique survival adventure, animated in a 1930s rubber hose style! Fight to survive: capture creatures, farm, mine, and craft everything you need: from gear and vehicles to your base. Explore strange lands and an underwater world of shipwrecks, dangers, and hidden wonders.
- 6
Hiraeth
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Action and Indie with Sonorous | Deep Down Below.
☵ HIRAETH is a sci-fi, first-person realistic survival game set on the desolate alien planet Ahra Prime, now offering an introduction to Story Mode with tasks and a multi‑stage quest. Explore on foot, by vehicle, or underwater as the planet tests you. Only the strong survive – but how long… and you?
- 7
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.
- 8
World In The Abyss
Single-player alternative to Sonorous | Deep Down Below — playable solo, no multiplayer required. Shares Action and Adventure with Sonorous | Deep Down Below.
The aliens have caused the oceans to rise, plunging the world into the abyss. Survive, craft, and explore this mysterious underwater world. Build your base, defend it against relentless waves of enemies, and dive deep to uncover the secret that could stop the alien invasion once and for all!