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...

WriteNor is a psychological meta-horror where the terminal is your only weapon. Trapped in a corrupted office, you rewrite reality with commands while NORI - a rogue AI - watches your every step.

A first-person observation game set in an endless loop. Spot subtle or deceptive anomalies, choose the right direction, and survive increasingly challenging and horrifying difficulty modes as you search for a way out.

You are trapped in an endlessly looping indoor swimming pool. The space feels familiar, yet something seems subtly off. If you sense that something is out of place, change direction. If nothing appears different, keep walking.

To cure a strange illness, you come to a bizarre hospital that seems abandoned. Someone tells you she can find a doctor, but you have to help her with some tasks first, such as taking some photos of the hospital's corpses. As things progress, you discover more abnormalities.

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 are a participant in Project Threshold, an experiment designed to force people to confront their deepest fears. Pass through sets of blue and red doors, survive what waits beyond them, and reach the end, if escape is even possible.

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.

Anant Express is set aboard a haunted sleeper-class indian train. You board the train as an ordinary traveler, but as the journey progresses, strange events begin to unfold. Mysterious passengers. Shifting compartments. Whispers in the dark. Nothing is as it seems.

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.

"Anomaly Road" is an escape game set on a mountain road in Japan, combining horror, driving, and strange occurrences. While driving, you suddenly realize you've gotten lost on a road deep in the mountains. As you turn a corner with a bad feeling, what awaits you...?

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

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?

A stalker is terrorizing the neighborhood, and you’re next. Watch for signs he’s been inside your house and make the right choices to avoid becoming his next victim. Test your observation skills in this Exit 8-style game where the threat isn’t supernatural, but a real man and you have three choices.

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

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 - Immerse yourself in the dark and unsettling atmosphere of psychological horror. Explore shifting locations, uncover fragments of memories, and reveal a story where reality fractures under the weight of guilt.

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?!

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.

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 are trapped in the Office. A first-person Observation-Game about walking an endless office, spotting anomalies, and getting off work.

Room 404 repeats. Identify anomalies, file reports, and stay alive—some anomalies might hurt you. Nurture the plants, listen to the overlord, end the loop, and unlock multiple unique endings.

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...

A first-person psychological horror game about the crushing weight of guilt. Live through the aftermath of a devastating tragedy: your wife is dead, and it’s your fault. But when her casket is brought home, something inexplicable and terrifying begins to warp your reality...

Callus is a short psychological horror (~30 minutes) in the walking simulator genre, featuring jump scares and themes of cruelty and overprotection. It was released as a transitional project between larger releases, with an intentionally simple story and concise gameplay.

Forced into working as an Anomaly Observer in a space stockroom, you must explore, observe carefully, and report inconsistencies. Earn Credits to buy upgrades, but beware: hideous horrors are creeping in the dark.

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

Trapped inside an experiment with no memory of how you arrived, your only way forward is an elevator. Observe each floor carefully, separate reality from anomalies, and make the right decisions to reach the top and escape.

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!

Screaming In The Basement is an inspired-by P.T. psychological horror game with an immersive atmosphere. You play as Mike, a fearless journalist determined to expose the truth, as he investigates a family brutally killed by a serial killer.

The Door Factory is a first-person horror game where you inspect mysterious doors before they are sent into production. Step inside, observe the environment, spot anomalies, and decide whether each door should be approved or reported.

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.