Single-player games like Demonsomnia
Below are 8 single-player Steam games similar to Demonsomnia, 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 Demonsomnia page.
Ranked picks
- 1

Dark Past
Single-player alternative to Demonsomnia — playable solo, no multiplayer required. Shares Action and Early Access with Demonsomnia.
Dark Past is based on psychological horror by paranormal activity occurring during your investigations. Play solo or up to 4 players to try and solve the mystery of what entity is left behind.
- 2

We Are Alive
Single-player alternative to Demonsomnia — playable solo, no multiplayer required.
We Are Alive is a Co-Op horror game, that can be played with at least 1 and up to 4 players. You are a detective and your mission is to investigate the old psychiatric hospital and find out the truth. Your standard equipment is a flashlight and a gun.
- 3

Phasmophobia
Single-player alternative to Demonsomnia — playable solo, no multiplayer required. Shares Action and Early Access with Demonsomnia.
Phasmophobia is a 4 player online co-op psychological horror. Paranormal activity is on the rise and it’s up to you and your team to use all the ghost-hunting equipment at your disposal in order to gather as much evidence as you can.
- 4

The Backrooms - Nightmare Dimension
Single-player alternative to Demonsomnia — playable solo, no multiplayer required. Shares Action with Demonsomnia.
The Backrooms - Nightmare Dimension is a Co-op online horror game with up to 4 players, where you and your friends take on the roles of soldiers who are part of the SCP Foundation with the mission to eliminate the mysterious entities found in the infamous place called "the Backrooms".
- 5

Lost Lullabies: The Orphanage Chronicles
Single-player alternative to Demonsomnia — playable solo, no multiplayer required. Shares Action with Demonsomnia.
"Lost Lullabies - The Orphanage Chronicles" is a Co-Op horror game set in 1980, inspired by the real stories of an orphanage ruined by a fire in 1960 Lowell. Playable with 1-4 players, the goal is to identify and expel malevolent spirits alone or with your team.
- 6

Remnant Records
Single-player alternative to Demonsomnia — playable solo, no multiplayer required. Shares Action with Demonsomnia.
Remnant Records is a horror investigation game for 1 to 4 players. Explore places haunted by the dead, survive elaborate and unique ghosts and find out what happened to them through thousands of generated stories.
- 7

This is a Ghost
Single-player alternative to Demonsomnia — playable solo, no multiplayer required.
This is a Ghost is a ghost-hunting psychological horror game. Using your equipment, track down paranormal activity and gather evidence to identify the entity, then banish it from this world! Solo and online co-op play for up to 4 players. 👻
- 8

DeathWatchers
Single-player alternative to Demonsomnia — playable solo, no multiplayer required. Shares Action and Early Access with Demonsomnia.
Use the specialized equipment at your disposal to locate & log as many paranormal events as possible. Decipher the ingredients needed for your ritual and try to exorcise any demons within. Any incorrect ingredients and you may never leave! 1-4 Players