IMHO.

Single-player games like Thalassa: Edge of the Abyss

Below are 11 single-player Steam games similar to Thalassa: Edge of the Abyss, 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 Thalassa: Edge of the Abyss page.

Ranked picks

  1. 1
    梦乡 The Dreamcatcher — Steam game cover

    梦乡 The Dreamcatcher

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares Indie and Adventure with Thalassa: Edge of the Abyss.

    The Dreamcatcher is a single player first person psychological adventure set in the modern times. You play as a young man who has just started his life in a big city. You will adventure into different dream worlds, overcome obstacles in the dreams with the help from outside the dreams.

    2020IndieAdventure12.99 USDSingle-playerSimilar games →
  2. 2
    Insanias — Steam game cover

    Insanias

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares Indie and Adventure with Thalassa: Edge of the Abyss.

    Insanias is a psychological horror game where you will have to explore what happened to find a hidden truth. To do this, you will have to be able to control your sanity to avoid falling into the madness that lurks in every corner. Are you ready to face your fears and discover the truth?

    2023IndieAdventureSimulation7.99 USDSingle-playerSimilar games →
  3. 3
    The Test: Secrets of the Soul — Steam game cover

    The Test: Secrets of the Soul

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares Indie and Adventure with Thalassa: Edge of the Abyss.

    You will answer a series of questions that will reveal things from deep within. Some will be uncomfortable, but with great knowledge comes great sacrifice. Can you make it all the way through The Test, and are you SURE you want the answers you seek? For it is time to unlock "Secrets of the Soul..."

    2023IndieAdventureSimulationFreeDeck VerifiedSingle-playerSimilar games →
  4. 4
    Kona II: Brume — Steam game cover

    Kona II: Brume

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares Indie and Adventure with Thalassa: Edge of the Abyss.

    Northern Québec, 1970. A bizarre mist —the Brume— is disconnecting a rural mining village from its quiet reality. Step into the shoes of Detective Carl Faubert as he unfolds the mysteries haunting the region while battling for his own survival.

    2023IndieAdventure29.99 USDDeck VerifiedSingle-playerSimilar games →
  5. 5
    The End of the Sun — Steam game cover

    The End of the Sun

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares Indie and Adventure with Thalassa: Edge of the Abyss.

    You are the Ashter – a Slavic fire mage and tracker of mythical beings. Following a legendary creature, you reach a village caught in a time rift. Embark on a magical investigation – travel through time, explore the ancient land, and bond with fire to shape villagers’ fate and uncover the mystery.

    2025IndieAdventure24.99 USDDeck VerifiedSingle-playerSimilar games →
  6. 6
    Anamorphine — Steam game cover

    Anamorphine

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares Indie and Adventure with Thalassa: Edge of the Abyss.

    Explore the past as you resolve the present in Anamorphine, a surreal adventure of rendered emotions. Journey into the mind of the main character, a young man in denial. His subconscious is pushing him to face his past - or be consumed by it.

    2018IndieAdventure19.99 USDSingle-playerSimilar games →
  7. 7
    The Last Case of John Morley — Steam game cover

    The Last Case of John Morley

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares Indie and Adventure with Thalassa: Edge of the Abyss.

    Step into the mind of John Morley, a 1940s detective on his final case. Explore shadowed places long forgotten by time, and piece together crime scenes in a narrative adventure steeped in mystery, unexpected twists, and a truth buried for decades.

    2025IndieAdventure12.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    Heavy Rain — Steam game cover

    Heavy Rain

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares Adventure with Thalassa: Edge of the Abyss.

    Experience a gripping psychological thriller filled with innumerable twists and turns. The hunt is on for a murderer known only as the Origami Killer. Four characters, each following their own leads, must take part in a desperate attempt to prevent the killer from claiming a new victim.

    2020ActionAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  9. 9
    My Child Lebensborn — Steam game cover

    My Child Lebensborn

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares RPG with Thalassa: Edge of the Abyss.

    《My Child Lebensborn》is a story driven nurture game based on real events. Play as the adoptive parent of Karin or Klaus, and experience the struggles they go through along them. Balance your time and resources wisely, while helping your child cope with effects of hatred.

    2021SimulationRPGCasualDeck PlayableSingle-playerSimilar games →
  10. 10
    Shadow Puppeteer — Steam game cover

    Shadow Puppeteer

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares Indie and Adventure with Thalassa: Edge of the Abyss.

    Invite a friend to explore the strange, yet beautiful world of darkness and light in Shadow Puppeteer, an award-winning, local co-op adventure.

    2014IndieAdventureFree To PlayFreeSingle-playerSimilar games →
  11. 11
    My Child New Beginnings — Steam game cover

    My Child New Beginnings

    Single-player alternative to Thalassa: Edge of the Abyss — playable solo, no multiplayer required. Shares Indie with Thalassa: Edge of the Abyss.

    My Child New Beginnings is a parenting simulator where you go through everyday life of growth. After a series of traumatic events that you and your child went through, you now get to rebuild life together in a new region of Norway.

    2025IndieSimulationSingle-playerSimilar games →