Single-player games like Opus Castle
Below are 9 single-player Steam games similar to Opus Castle, 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 Opus Castle page.
Ranked picks
- 1
Bad Omens: 8th Apartment
Single-player alternative to Opus Castle — playable solo, no multiplayer required. Shares Action and Adventure with Opus Castle.
You play as a student named Lisa, who has just moved in with her university friend. But instead of a carefree student life, Lisa faces events full of despair and fear when she is left alone in her apartment number 8...
- 2
Nightwatch at The Museum
Single-player alternative to Opus Castle — playable solo, no multiplayer required. Shares Adventure with Opus Castle.
A routine night shift at an old Javanese museum. A fire from 1990 that nobody talks about. And something, or someone that refuses to let the truth stay buried.
- 3
ADUK: Curse of the Spirits
Single-player alternative to Opus Castle — playable solo, no multiplayer required. Shares Action and Adventure with Opus Castle.
Washed ashore on a forbidden island, you face ruthless soldiers and an invisible terror. Every step brings you closer to breaking the curse… or embracing it forever.
- 4
The Sewer Job
Single-player alternative to Opus Castle — playable solo, no multiplayer required. Shares Adventure with Opus Castle.
You were on the brink of becoming homeless, but that's when you found a sewer job application, you got accepted. What seemed like a chill work at first turned quickly in to an unsettling experience.
- 5
Beyond The Evil
Single-player alternative to Opus Castle — playable solo, no multiplayer required. Shares Action and Adventure with Opus Castle.
Beyond the Evil is an psychological horror game that places the player to a hard experience to find who created one supposed plague that might doom the world.
- 6
Lost Eclipse
Single-player alternative to Opus Castle — playable solo, no multiplayer required. Shares Action and Adventure with Opus Castle.
After the city was shrouded with nightmares, you’ve been assigned to dive into this psychological survival-horror adventure to uncover the strange phenomenon that were affiliated to a certain science-tech corporation and bring them to justice.
- 7
Eyes Of The ElderWood
Single-player alternative to Opus Castle — playable solo, no multiplayer required. Shares Action and Adventure with Opus Castle.
Eyes Of The ElderWood is a first-person adventure horror set in Kashubian folklore, emphasizing diverse locations, challenges, and enemies. Draw spells to solve puzzles and deal with foes, or fight using a revolver. Keep an eye on your sanity level to avoid descending into madness.
- 8
Haunted Shores
Single-player alternative to Opus Castle — playable solo, no multiplayer required. Shares Action and Adventure with Opus Castle.
Haunted Shores is a Single-player horror game where you are an investigative journalist of the paranormal, travelling to different locations confirming or debunking the tales of each. Just you against the darkness.
- 9
Opus Castle VR
Single-player alternative to Opus Castle — playable solo, no multiplayer required. Shares Action and Adventure with Opus Castle.
Opus Castle VR is a 3D horror, adventure and mystery game with a narrative based on the true and tragic story of the small castle on Apa Street, located in the city of São Paulo, Brazil.