Top similar games like Onionisin:

To those who will become investigators at our research institute, Our institute conducts research on mysterious phenomena and grudges that occur in schools. As an investigator, you will carry out field surveys, but it is a simple job that even those with no experience can perform.

Search a dark bunker for a missing brother. Solve puzzles, uncover hidden clues, and survive terrifying encounters in a tense, immersive world.

Estranged: The Departure follows the story of a fisherman, stranded on a mysterious island during a violent storm. Little does he know his adventure has just begun, and the island is home to more than it first seems.

Nightly Maintenance is a psychological horror hidden object game. Play as Malcom, the maintenance worker, tasked with completing 3 tasks each night in a creepy, abandoned factory. Beware the watchful eyes of an oversized mannequin.

Embark on this Lovecraft-inspired tale and discover the mysteries that await you in this island. Explore the enigmatic lighthouse, solve challenging puzzles and most importantly: try not to lose your sanity when facing the darkness of your mind.

Single-player horror game based on the backrooms universe. Your task is to pass levels, puzzles and try not to die during all this.

Explore the deepest parts of the Backrooms in an attempt to escape alive, alone or with your friends! Are you ready to face this dangerous world? Or will you accept your fate and die? Choose, or the Backrooms will choose for you!

Trapped in a bazaar that twists with every turn, you are a lost child searching for your mother. Watch for subtle anomalies in the shifting environment to survive the loop. In this retro-inspired world, nothing is as it seems. Can you find her before the cycle swallows you whole?

First-person, story-based horror game. The game evokes a grim atmosphere, a sense of dread, and tension. Discover the gruesome secrets of the house.

How long has it been? A man sits in a distant getaway cabin waiting for his wife Serena. Where is she? Things in the cabin evoke memories, and the husband comes to a disturbing realization... This short point-and-click adventure is the result of a massive collaborative effort between dozens of fans and designers of adventure games.

A survival horror with anomaly hunting, where you’re trapped in a school classroom frozen outside of time. Find a way to escape. But remember: every choice you make carries unpredictable consequences.

"CowaCowa: Jinmenken" is a 3D horror adventure game based on the Japanese urban legend of the "Jinmenken," a dog with a human face. Explore a hand-drawn 2.5D world from a first-person perspective, uncovering eerie mysteries in a quiet residential neighborhood at night.

3Tower is a first-person horror adventure experience where you play as a night watchman on the graveyard shift. You might explore what going on here, or you might survive the night shift. It's up to you. This is a dense deep exploration in natural fears of graveyards - but pushed to a new level.

Marzu is a first-person psychological horror game where you explore shifting ancient ruins, solve environmental puzzles, and survive an unseen presence in an atmosphere of constant dread.

Melo's Nightmare is a first-person perspective 3D escape horror game. Players find themselves trapped in corridors and must investigate puzzles to attempt escape. A casual horror game akin to walking through a deserted amusement park haunted house. Will players be able to get out safely?

Welcome to Room 1028 of the Despair Hotel! An attraction where you search for mistakes in the supernatural space Even if you suffer injuries so severe that they might kill you, it's okay You'll wake up in Room 1028 as if nothing happened Please enjoy to your heart's content until you're satisfied

Face Your Fear is a psychological horror game where stress can kill you. Solve enigmas, survive terrifying paranormal events, monitor your BPM, and escape a house turned into a living nightmare. Run, hide, and survive… because you cannot fight back.

Dead On Arrival: Remastered is an atmospheric horror-puzzle game. Uncover the true consequences of one’s actions. A remastered version of the original classic!

Find a way out before you become a permanent part of the game. Your childhood nightmares have found you. Trapped in the endless, eerie playrooms of the Backrooms.

DON'T FACE UP is a first-person horror game. Never make eye contact with them. They may appear and disappear. They may be standing in the direction you suddenly turn your eyes. Even in such a situation, you must proceed with your search for the building. Therefore, "DON'T FACE UP."

Dreaded Wunder is a psychological horror game set in a twisted version of Norwich, Featuring local myths and legends with a hint of Eldritch horror. Navigate the contorted world that lies before you and find a way to escape fate by relying on a mobile phone to survive!

Ifrit is a first-person psychological horror game. It can impress you with its dark atmosphere, which is realistic and frightening. Are you ready to face the Ifrit demons, the strongest of the demons?

Unravel a dark mystery by searching for hidden secrets that may reveal a deadly conspiracy in this psychological horror thriller. A strange phone call will put your life in danger, and you’ll have to make a decision that could change the fate of the world.

Relive the lives of a student, teen, and worker in this first-person Japanese horror. With gentle scares, one-hour playtime, and a striking monochrome style, it’s perfect for newcomers. Crafted solo by a 20-year-old, this exploration-driven tale blends beauty with quiet dread.

"The Meaning" is a first-person psychological horror game focused on tense exploration and immersive storytelling. You are Ethen Daniels, a man who is struggling with the loss of his family and is now pursuing the meaning of life once again.

A co-op horror about hunting for feed and scavenging for your life. Don't let Devi go hungry for too long.

Sussy Babies: Reborn is a psychological horror experience, where you and your friend get trapped in a mysterious mine system, the deeper you go, the stranger the mines become, and the more challenging it gets to find your way out.

He asked only for your help. For humanity left unprotected, you are the only hope. Can you uncover the secrets and set everything right?

Forest God is a psychological horror game from the first person. The investigation of Agent X of the secret service turns into an endless journey deep into the universe, filled with abnormal incidents, the nature of which is previously unknown to anyone.

You've been trapped in a looping space by Pachiko's mischief! Find the anomaly, choose the right path, and aim for the goal!

You are trapped in an office on the 25th floor. Observe your surroundings carefully to reach the exit on floor 0.

You flip PCs as a hobby. An unbelievable flea market find from 2015 turns into a nightmare. The moment you boot this Windows 7 setup, a blinding force sucks you straight into the monitor. Now you are trapped in the strange futuristic world of Frutiger Aero. No soul is in sight. Or so it seems...

The Profaned is an Anomaly-Hunt horror game about a person who's trying to cleanse his sins. The primary task is to investigate the endless forsaken church to find the anomalies and capture them with your camera to cleanse your sins. And if you fail to do so, start again from the beginning.