Single-player games like Investigator
Below are 16 single-player Steam games similar to Investigator, 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 Investigator page.
Ranked picks
- 1

ShadowSide
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
ShadowSide is a First Person Exploration game. A policeman Alex Carter has been watching over the tranquility in the town for many years. He protects the people from robbery and crime. Nothing but a routine.
- 2

弃层凶谈
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
Curse Of The Abandoned Floor is a first-person Chinese horror game. It starts with a paranormal video about an urban legend: "Beware the non-existent elevator mezzanine. If you enter it, you will be trapped forever."
- 3

Sasaeng | 사생
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
A first-person psychological horror game about the life of a K-pop idol. Explore a luxury apartment, Korean streets, and your agency building as you confront the unsettling truth hidden beneath the surface.
- 4

Visage
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
Visage is a first-person psychological horror game. Explore a mysterious ever-changing house in a slow-paced, atmospheric world that combines both uncannily comforting and horrifyingly realistic environments, and enjoy a genuinely terrifying experience.
- 5

SLEEP AWAKE
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
In the last known city on Earth, people are disappearing in their sleep. Those who remain exist in a crisis of reckless experiments to keep awake. From Cory Davis (Spec Ops: The Line) and Robin Finck (Nine Inch Nails), SLEEP AWAKE blurs the boundaries between reality and imagination.
- 6

Contagion VR: Outbreak
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
Contagion VR: Outbreak will immerse you into the middle of a zombie apocalypse. Relive stories of the survivors in the Single Player campaign, take your time in Free Roam, or check out the Firing Range!
- 7

The Light Remake
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
There is only you, the abandoned remains of a former life and the flourishing nature that feels great in the absence of man. This world is both gloomy and empty, but so incredibly beautiful.
- 8

The Long Dark
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
THE LONG DARK is a thoughtful, exploration-survival experience that challenges solo players to think for themselves as they explore an expansive frozen wilderness in the aftermath of a geomagnetic disaster. There are no zombies -- only you, the cold, and all the threats Mother Nature can muster.
- 9

On The Road - The Truck Simulator
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Simulation with Investigator.
From 18 tonners to the Gigaliner, ON THE ROAD – The Truck Simulator offers everything a trucker’s heart desires.
- 10

Stalker
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
The background story of "Stalker" is that a teenager encounters various events on the road following a young girl. The teenager(player) can selectively interact and give repairs / help due to these events. How you will lead to different ending. The game was developed during the Global Game Jam 2020.
- 11

Metro Exodus
Single-player alternative to Investigator — playable solo, no multiplayer required.
Flee the shattered ruins of the Moscow Metro and embark on an epic, continent-spanning journey across the post-apocalyptic Russian wilderness. Explore vast, non-linear levels, lose yourself in an immersive, sandbox survival experience, and follow a thrilling story-line that spans an entire year in the greatest Metro adventure yet.
- 12

AMNESIA
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
After a series of events now shrouded in mystery, our protagonist - a young man - fell into a coma, losing all recollection of the person he used to be. He is given a clean slate. All that’s left to do now is to carefully and thoroughly investigate every facet of your former self.
- 13

H.E.N.T.A.L.K.E.R.
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
Forget about the rules, there are none here. Just you, your weapon and the endless, ominous wastelands waiting for you to plunge into them. So, are you ready to become a predator among predators? Then welcome to H.E.N.T.A.L.K.E.R.. It will hurt, but damn it will be fun!
- 14

The Road 66
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
The Road 66 is a 2D pixel art adventure where Kai and childhood friends Sue and Nile hit the road to find the brothers' missing mother. Along Route 66, they’ll encounter talking cats, dancing fire gods, and eerie folklore. Start the engine—adventure awaits!
- 15

ColdSide
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
ColdSide is a psychological horror first-person game. It takes place in an abandoned underground laboratory that studied anomalous phenomena.
- 16

Uninvited Guest
Single-player alternative to Investigator — playable solo, no multiplayer required. Shares Indie and Adventure with Investigator.
Uninvited Guest is a first-person psychological horror game set in 1930. You play as a villager who was destined to end up in an old mansion.