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

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.
- 2

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?
- 3

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..."
- 4

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.
- 5

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.
- 6

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.
- 7

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.
- 8

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.
- 9

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.
- 10

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.
- 11

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.