Single-player games like Full Fathom
Below are 8 single-player Steam games similar to Full Fathom, 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 Full Fathom page.
Ranked picks
- 1
Big Fish
Single-player alternative to Full Fathom — playable solo, no multiplayer required. Shares Action and Indie with Full Fathom.
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.
- 2
Sunken Veins
Single-player alternative to Full Fathom — playable solo, no multiplayer required. Shares Action and Indie with Full Fathom.
Sunken Veins is a resource management horror game set in a deep sea mining facility. You collect resources deposited by an underwater drill, avoid adaptive monsters and drain away overwhelming floods of water caused from mining operations.
- 3
DIVE or DIE - Children of Rain
Single-player alternative to Full Fathom — playable solo, no multiplayer required. Shares Action and Indie with Full Fathom.
Every descent is a deadly gamble. DIVE or DIE in the cursed abyss, face Eldritch horrors to uncover the mystery of the black rain. Scavenge and upgrade, recruit and sacrifice. Save your camp... The Flood is coming.
- 4
Killer Depths
Single-player alternative to Full Fathom — playable solo, no multiplayer required. Shares Action and Adventure with Full Fathom.
Pilot a submarine in a horrific, deep sea expedition. Study the monsters the lurk below and look for their signs. Adjust your speed, noise and light levels to scare off, or hide from whatever you think is out there. Poor judgment will lead to a watery grave.
- 5
Subterror
Single-player alternative to Full Fathom — playable solo, no multiplayer required. Shares Action and Indie with Full Fathom.
Explore abandoned biospheres at the bottom of the ocean, alone or with up to 4 friends.
- 6
Darkwater
Single-player alternative to Full Fathom — playable solo, no multiplayer required. Shares Action and Indie with Full Fathom.
Darkwater is a cooperative extraction horror game for 1-4 players. Command a submarine trapped under the ice of an alien planet. Battle enemy vessels and deep sea abominations as you hunt for resources. Do what it takes to survive.
- 7
Barotrauma
Single-player alternative to Full Fathom — playable solo, no multiplayer required. Shares Action and Indie with Full Fathom.
Barotrauma is a 2D co-op submarine simulator – in space, with survival horror and RPG elements. Steer your submarine, complete missions, fight monsters, fix leaks, operate machinery, man the guns and craft items, and stay alert: danger in Barotrauma doesn’t announce itself!
- 8
Echoes of the Living
Single-player alternative to Full Fathom — playable solo, no multiplayer required. Shares Action and Indie with Full Fathom.
Echoes of the Living is a dark Classic Survival Horror inspired by the greatest hits from the 90's focused on reimagining visual horror, your goal is to make it out alive while uncovering the truth about the incident.