Single-player games like H.I.A: Horror Investigation Agency
Below are 10 single-player Steam games similar to H.I.A: Horror Investigation Agency, 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 H.I.A: Horror Investigation Agency page.
Ranked picks
- 1
Dark Past
Single-player alternative to H.I.A: Horror Investigation Agency — playable solo, no multiplayer required. Shares Action and Indie with H.I.A: Horror Investigation Agency.
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
Gluua
Single-player alternative to H.I.A: Horror Investigation Agency — playable solo, no multiplayer required. Shares Indie with H.I.A: Horror Investigation Agency.
first-person 1-4 multiplayer horror game. The game will allow players to take on the role of a spirit liberator who will be able to freely choose missions based on the difficulty and readiness they like or want to do. Players will encounter the supernatural and find the truth in that place.
- 3
Breach Signal
Single-player alternative to H.I.A: Horror Investigation Agency — playable solo, no multiplayer required. Shares Action and Indie with H.I.A: Horror Investigation Agency.
Breach Signal is a 1-6 player co-op cosmic horror game. As a recruit of the FNA, lead expeditions into strange places and investigate mysterious anomalies that threaten our reality.
- 4
Deepscape Inc
Single-player alternative to H.I.A: Horror Investigation Agency — playable solo, no multiplayer required. Shares Action and Indie with H.I.A: Horror Investigation Agency.
A 2 to 4 player co-op horror game. You wake up marked with an ID number you can't see on your own back. Only your fellow inmates can read it. Find each other, share your numbers, reach your validation rooms, and get out before whatever roams the halls finds you first.
- 5
LockYourDoor
Single-player alternative to H.I.A: Horror Investigation Agency — playable solo, no multiplayer required. Shares Action and Adventure with H.I.A: Horror Investigation Agency.
Challenging co-op horror (1-4 players). You are looking for your missing friend Darvin. Do whatever it takes to stay alive. Only the patient and the clever will succeed.
- 6
Project Unknown
Single-player alternative to H.I.A: Horror Investigation Agency — playable solo, no multiplayer required. Shares Action and Indie with H.I.A: Horror Investigation Agency.
An online co-op horror game featuring unique playable characters and RPG mechanics. Exorcise ghosts using your special abilities and tools while surviving the supernatural onslaught
- 7
School 666
Single-player alternative to H.I.A: Horror Investigation Agency — playable solo, no multiplayer required. Shares Action and Indie with H.I.A: Horror Investigation Agency.
School 666 is a 1-4 Player Co-op Survival Horror. You must escape this endless nightmare. Try to identify the correct path and survive the anomalies in this endless school. Some extremely powerful anomalies will catch you to their dimensions. Explore the reason why you are here... and don't die.
- 8
Lost Lullabies: The Orphanage Chronicles
Single-player alternative to H.I.A: Horror Investigation Agency — playable solo, no multiplayer required. Shares Action and Indie with H.I.A: Horror Investigation Agency.
"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.
- 9
The Anomaly Project
Single-player alternative to H.I.A: Horror Investigation Agency — playable solo, no multiplayer required. Shares Action and Indie with H.I.A: Horror Investigation Agency.
Your goal is simple, spot anomalies to escape. Play alone or together with up to 8 players in online co-op. Make the right decisions to advance to the next level, or risk being reset to the beginning!
- 10
Anomaly Company
Single-player alternative to H.I.A: Horror Investigation Agency — playable solo, no multiplayer required. Shares Action and Indie with H.I.A: Horror Investigation Agency.
You and your crew are sent in to assess reality in this 4-player co-op horror game. Memorize the environment. Spot disturbing anomalies. Decide if the timeline is safe. One bad call—and you’re forced to start over.