Single-player games like Injection No.9 - Chapter 1 (The Prologue)
Below are 8 single-player Steam games similar to Injection No.9 - Chapter 1 (The Prologue), 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 Injection No.9 - Chapter 1 (The Prologue) page.
Ranked picks
- 1
Necrologium
Single-player alternative to Injection No.9 - Chapter 1 (The Prologue) — playable solo, no multiplayer required. Shares Indie and Adventure with Injection No.9 - Chapter 1 (The Prologue).
Seven corrupted souls died in one fateful night. Discover their sins and unravel the mystery that surrounds their mortal shells.
- 2
The Soul
Single-player alternative to Injection No.9 - Chapter 1 (The Prologue) — playable solo, no multiplayer required. Shares Action and Adventure with Injection No.9 - Chapter 1 (The Prologue).
The Soul is a story about a hunter of monsters that hide among humans. This project confidently erases the line between the player and the protagonist.
- 3
Clink
Single-player alternative to Injection No.9 - Chapter 1 (The Prologue) — playable solo, no multiplayer required. Shares Indie and Adventure with Injection No.9 - Chapter 1 (The Prologue).
You are a lonely woman, secluded in a house with your cat... and the secrets of the past. What hides within your mind — illness, or something otherworldly? Nightmares and reality intertwine… everything is so foggy. Do you have the courage to remember what happened?
- 4
Dark Past
Single-player alternative to Injection No.9 - Chapter 1 (The Prologue) — playable solo, no multiplayer required. Shares Action and Indie with Injection No.9 - Chapter 1 (The Prologue).
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.
- 5
Lost Lullabies: The Orphanage Chronicles
Single-player alternative to Injection No.9 - Chapter 1 (The Prologue) — playable solo, no multiplayer required. Shares Action and Indie with Injection No.9 - Chapter 1 (The Prologue).
"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
Phasmophobia
Single-player alternative to Injection No.9 - Chapter 1 (The Prologue) — playable solo, no multiplayer required. Shares Action and Indie with Injection No.9 - Chapter 1 (The Prologue).
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.
- 7
iBLiS
Single-player alternative to Injection No.9 - Chapter 1 (The Prologue) — playable solo, no multiplayer required. Shares Action and Indie with Injection No.9 - Chapter 1 (The Prologue).
Demon is a first-person psychological horror game. How much can a game affect your real life? Enjoy a realistic home environment and terrifying moments of being immersed in a real-life story.
- 8
Radiolight
Single-player alternative to Injection No.9 - Chapter 1 (The Prologue) — playable solo, no multiplayer required. Shares Indie and Adventure with Injection No.9 - Chapter 1 (The Prologue).
Ashwood Creek, 1985. A child disappears without a trace. A local policeman is drawn into a national park, seeking the truth. Mysterious radio signals beckon him further and further. Investigate, survive and face the unknown in Radiolight— an '80s thriller by solo dev Krystof Knesl.