Haunted Investigation
A spine-tingling horror experience for 1–2 players. Explore an abandoned mansion, survive the night, and make choices that decide how your story ends.
The game that started it all
Haunted Investigation is the first game from Interactive Wave Studio, released on Steam in August 2023. It is a co-op horror game for 1 to 2 players set in an abandoned mansion that hides far more than dust and broken furniture. Armed with a flashlight and not much courage, you explore its rooms, piece together what happened there, and try to make it to morning.
Where many horror games rush you from scare to scare, Haunted Investigation is a slow burn. Sound matters. Light matters. The mansion rewards players who pay attention and punishes the ones who sprint through doors without listening first. Play it alone for maximum dread, or bring a friend in online co-op and discover that two flashlights do not make the dark any friendlier.
Your choices, your ending
The investigation is not on rails. Decisions you make during the night lead to multiple endings, and unlocking them all means going back into the mansion knowing exactly what is waiting for you. Some endings are earned. Some are survived. One or two are deserved.
- 1–2 player online co-op, or single player if you trust your own nerves.
- Multiple endings shaped by the choices you make.
- Exploration-driven horror: hide in closets, manage your light, and listen.
- 83% positive rating from players on Steam.
A finished game, a haunted legacy
Development on Haunted Investigation is complete. The game is stable, whole, and exactly what we wanted it to be: the foundation everything else was built on. The lessons it taught us about tension, co-op scares and player choice went directly into our flagship, Ghost Janitors, a 1–4 player co-op horror game that is updated regularly. If you enjoy the mansion, the night shift is waiting.
Screenshots
Inside the mansion
FAQ
Before you open the door
Is Haunted Investigation a co-op game?
Yes. Haunted Investigation can be played solo or in online co-op with a friend, for a maximum of 2 players. The mansion feels very different when someone else can hear you scream.
Does Haunted Investigation have multiple endings?
Yes. The choices you make during the investigation lead to different endings, so there is a real reason to go back into the mansion after your first night.
Is Haunted Investigation still being updated?
Haunted Investigation is a finished game. Development is complete, and the studio's active work now goes into Ghost Janitors and the next unannounced project.
Do I need to play Haunted Investigation before Ghost Janitors?
No. The two games are independent stories. Haunted Investigation is a slower, exploration-focused horror for 1–2 players, while Ghost Janitors is a faster 1–4 player co-op horror about cleaning haunted locations.
Dare to investigate?
The mansion has been waiting since 2023. It is very patient.