Top similar games like HAL Protocol:

This is an indie horror game with first-person puzzles. Terror and fear have enveloped the city. The maniac has returned. You sneak into his lair to try and stop him before he goes too far...

An alien hides among the pigs. Can you spot the imposter before it's too late? A tense observation horror game inspired by The Thing, where every oink could be your last.

You find yourself lost in a place that shouldn’t exist. Everything feels off — the silence, the looping spaces, the emptiness around you. Instinctively, you begin documenting it all. Liminal State is the beginning of something larger, something unknown — and it all starts here.

Sector 404 is a first-person anomaly horror game set in a crumbling Soviet housing block. After taking your medicine, your world begins to fracture. Climb from floor to floor, uncovering distorted anomalies and your own unraveling mind. Miss too much, and reality resets. Will you ever make it home?

Paper Department is a psychological horror game in which you are a night-shift clerk working at a sinister paper company, who must approve or reject never-ending stacks of documents—while pursued by horrific visions, nightmare memories, and a mind that cannot be trusted.

Someone slipped a mysterious videotape under your door... Do you dare watch it?!

A short anomaly horror game inspired by Exit 8–like titles. Observe the house, spot anomalies, and make decisions based on what you find. Explore interactive anomalies, make use of a unique feedback system if you fail and unlock new areas as nights pass.

You are here to listen to The Voice, do what he says. But don't listen to other voices...

You find yourself in a quiet room with four doors. There's ALWAYS an anomaly. Choose wisely.

"Mannequin machine" is a first-person psychological horror game with camera effects that tells the story of working in a mannequin factory. Beware of the evil at the heart of the plant, it drives its victims crazy

You're trapped in the seemingly endless corridors of a space station, desperately searching for the evacuation bay 09. But the station is not as empty as it seems; you must observe for subtle, unsettling occurrences and log them if you want to move forward. Can you break the loop and escape?

You are heading down an endless corridor in search of a missing child. Pay close attention to your surroundings to find clues about the child, and find a way to escape the dark, confined corridor.

Nightmare Within - is an atmospheric horror game created on the Unreal Engine 5 engine by a single developer. Explore the dark corners of the house with a flashlight and solve puzzles while trying not to scream.

Prison of Nightmare is a first-person psychological horror game that immerses players in a haunting and oppressive atmosphere. The game revolves around an ancient dark entity, a malevolent spirit that invades the protagonist's dreams, aiming to terrorize and eventually capture their soul.

You have been sent photographs of a place where, according to rumors, an artifact of an ancient civilization is hidden... Do you dare to go there?!

Angstraum is an oppressive horror game that traps you in a threatening, never-ending loop. Observe your surroundings, uncover deviant anomalies, and escape deadly threats to find the exit.

You have arrived in a forest where people are rumored to disappear and strange things happen... Locals often see bright flashes and hear strange sounds...

Your job at the Cabin Factory is simple: inspect the cabins and decide on whether they’re haunted or not. If you do find any anomalies, get out…immediately.

Christmas Nightmare is an atmospheric horror game about New Year's Eve.

Spot anomalies and uncover hidden clues to escape an office where overwork turns strange and experiments happen more often than coffee breaks.

Obfuscation is a first-person indie horror game set entirely within a mysterious house. You don’t know how you got here - or why. Explore the house as reality slowly begins to fall apart, and uncover the truth.

Welcome to the company.Your task is to detect and report any strange occurrences happening around you.If you successfully complete all reports for 8 days without mistakes, you will achieve your goal.Observe carefully and endure until the end.

Remote Position is a single-player horror story where you must follow strange tasks given to you by your new remote supervisor. The tasks launch you deep into a mysterious rabbit hole left by your late father. The gameplay includes puzzles and action sequences where you need to think quick!

Michael and John are vloggers exploring a notorious abandoned house. John disappears without a trace, and Michael gets trapped inside. Now Michael has to find out what’s really going on to make it out alive.

A short psychological horror inside an elevator. Answer each question to rise higher one mistake, and you fall.

You start from the 10th floor in a hotel and must make your way to the exit. However, you must look for any potential anomalies on each floor to safely make it out.

In a remote provincial town, teenagers mysteriously disappear every 25 years. You're a high school student about to turn 18... But what if you become the next victim?

You are trapped in an endless subway platform. Observe your surroundings carefully and escape this nightmare. This is all a lie...

Investigating the mysterious death of his grandmother, a detective breaks into her home to discover the truth, but the dwelling begins to play tricks on him. The space breaks, fears become flesh, and there is still no way out. Every step, every new room, every cycle is a chance to go mad.

Uncanny Tales is an episodic horror series where the real terror comes not from monsters or the supernatural, but from people. Each episode is a new unsettling story inspired by real fears and eerie situations from everyday life.

You are stuck in an apartment building with endless floors full of fear. Observe your surroundings carefully to climb to the 15th floor and reach the roof of the building. Do not ignore any abnormalities. Your carelessness may result in death.

You woke up in some basement and don't remember who you are or how you ended up here... But what you do know is that you need to get out of here...

A horror game that tests your wits, courage and dark sense of humor. Solve puzzles to survive in a world full of dark secrets, but beware - there could be something waiting around every corner!

P.T. inspired, an investigative reporter called Mike investigates a tragic family murder. Strange things from 1991 hide beneath a chilling silence, something far more dangerous, an evil rooted in darkness, a realistic and immersive horror atmosphere.

Lost August is a single-player open-world walking simulator game based on the concept of liminal spaces and the backrooms. Experience a dream-like world through the lens of a VHS camera as you explore the contents of a recently discovered video tape.

In Floor13, reality doesn’t change all at once — it shifts quietly, waiting for you to notice.You walk the same office corridor over and over, but something always feels… slightly off.Your task is simple: observe, detect, report. If you fail to see the difference, the corridor will keep you forever.