
Unknown Rules is an independently created multiplayer online horror game that supports 1-4 players.
60+ similar titles based on shared tags and player behavior. Themes include Horror, First-Person, Indie, 3D.

Unknown Rules is an independently created multiplayer online horror game that supports 1-4 players.

Ghost Hunter
Ghost Hunter is a co-op horror escape game for 1–4 players. As the owner of a supernatural agency, you accept ghost-related cases and carry out cleansings. You’ll need to choose your gear wisely, and you can tackle the cases solo or team up with others to survive and succeed.

Shadows At Bay
This is a first-person horror game where you find yourself trapped in a haunted hedge maze at night, chased by a terrifying ghost. You need to use the voice activated lamps to protect yourself and find the way out.
Ghost Hunter is a co-op horror escape game for 1–4 players. As the owner of a supernatural agency, you accept ghost-related cases and carry out cleansings. You’ll need to choose your gear wisely, and you can tackle the cases solo or team up with others to survive and succeed.
Why similar: Thriller 32.8%, Horror 22.2%, Co-op 9.4%, First-Person 9.2%, Online Co-Op 8.4%
This is a first-person horror game where you find yourself trapped in a haunted hedge maze at night, chased by a terrifying ghost. You need to use the voice activated lamps to protect yourself and find the way out.
Why similar: Thriller 35.2%, Horror 26.3%, First-Person 18.8%, 3D 13%, Action 4.9%
University 33 is a 1-4 player co-op anomaly detection simulator. Observe your surroundings with unwavering focus: follow the protocol, identify the irregularities, and choose the correct path to reach Floor 33. One lapse in judgment restarts the cycle.
Why similar: Thriller 25.2%, Horror 17.1%, Co-op 15.1%, Online Co-Op 14.5%, First-Person 12.3%
Necrophoresis is a co-op horror game for 1-4 players. Explore a haunted morgue to find its dark secrets. Use what you can find to make your way through the morgue and find your way out.
Why similar: Thriller 29.2%, Horror 22.9%, Co-op 18.7%, Multiplayer 9.4%, First-Person 8.5%
Peril in the Pines is a short & simple first-person horror game where the player is trapped on an island with strange creatures. The player must collect the resources to fix their boat before being caught and getting trapped forever.
Why similar: Thriller 39.9%, Horror 27%, First-Person 12.1%, 3D 11.3%, Story Rich 8%
Specter Trail is a gripping horror game where you play as Fares, a private investigator unraveling the dark secrets of the Vanderbilt family. Immerse yourself in a linear narrative filled with unexpected twists, eerie specters, and challenging puzzles.
Why similar: Thriller 35.1%, Horror 23%, First-Person 20.6%, 3D 17.8%, Indie 3.5%
Behind The Backrooms: Lost Levels is survival horror game where you explore eerie, hidden levels filled with terrifying entities, cryptic puzzles, and relentless dangers. survive deadly encounters, and find your way out—before you become another lost soul trapped forever.
Why similar: Thriller 29.2%, First-Person 15.7%, Horror 13.8%, 3D 12.8%, Co-op 7.9%
A psychological horror game that centers on exploration, puzzle-solving, and terrifying entity encounters
Why similar: Thriller 23.2%, Horror 17.7%, First-Person 15.9%, 3D 12.8%, Co-op 9.4%
Punch out or get punched! Unemployed Nightmare Together is a 1–4 player co-op horror where you're trapped inside a nightmare office by a relentless job application. Restore power, complete your paperwork, and reach the elevator before you're drained. Quitting is not an option.
Why similar: Thriller 39.3%, Horror 19.1%, Online Co-Op 16.4%, Multiplayer 8.4%, First-Person 6.4%
The Grounds Escape is a co-op survival horror game for up to 4 players. Team up with your friends to solve intricate puzzles and escape this living hell. Remember: every item has a purpose, every sound has a meaning, and every choice comes with a price... paid in blood.
Why similar: Thriller 20.9%, Horror 19%, Online Co-Op 15.6%, Co-op 15.2%, First-Person 11.2%
Race against a relentless monster in this heart-pounding multiplayer horror. Play as one of four survivors trapped in an asylum, working together to solve puzzles and search for keys. You can't fight back - only escape. Will you outwit the monster and find freedom, or succumb to the darkness?
Why similar: Horror 22.3%, Online Co-Op 19%, Co-op 18.5%, First-Person 15.7%, 3D 9.6%
Dive into heart-pounding terror with our CO-OP horror experience for 5 PLAYERS. Uncover chilling mysteries, face unspeakable horrors, and survive together in this intense collaborative nightmare. Will your team escape the shadows, or succumb to the darkness that lurks within?
Why similar: Horror 19.6%, First-Person 17.6%, Thriller 15.4%, 3D 14.2%, Co-op 13%
Distressed is a 5 player online co-op horror game. Welcome to G.H.O.S.T. HQ. Forget what you know about ghost hunting. This is Not a Sanity Based Game. First you feed it energy, Then you feed it souls. Will you survive?
Why similar: Horror 24.3%, First-Person 23.3%, Co-op 19%, Online Co-Op 17%, Multiplayer 7.4%
Out of Place: Origin is a survival game built on attention and observation. In a diner where reality quietly collapses, notice the anomalies, capture them on camera, and survive… Because sometimes, the thing watching you isn’t a mistake.
Why similar: Thriller 35.9%, Horror 23.4%, First-Person 20.8%, 3D 18%, Indie 1.9%
Chained in the Backrooms is a 1-4 player co-op, mission-based horror game. Trapped in a blurry subconscious and chained together, toy bears must solve puzzles, complete challenging missions, and survive against creatures trying to destroy them.
Why similar: Thriller 24.3%, Horror 16.8%, Online Co-Op 16.2%, First-Person 11.7%, Co-op 11.2%
Nostalgia is a two-player cooperative indie game that escapes from enemies in a dark labyrinth. After waking up in the deep, dark forest, the two follow an unidentified girl into the labyrinth. Avoid enemies in the labyrinth, find a diary, reveal the hidden past, and escape.
Why similar: Horror 26.2%, Co-op 20.8%, First-Person 17.1%, Online Co-Op 16.5%, Multiplayer 10.4%
Unhuman Nightmare is a 4 player online co-op game where a team of thieves want to steal items from haunted places. What they don't know is that the places are full of traps set by ghosts. Chances are, they'll not escape alive...
Why similar: Thriller 20.4%, Horror 17.8%, Online Co-Op 16.7%, Co-op 15.7%, First-Person 14.3%
Work together with your team in a lab filled with deadly mutations. Eliminate the Primary Mutation and claim your reward. Only those who survive can pay off their debt.
Why similar: Horror 25.2%, Co-op 18.9%, Online Co-Op 17.2%, First-Person 11.5%, Multiplayer 11%
Finally, home alone. With your parents and brother away on holiday and not due back for days, you've got the whole place to yourself. Sounds perfect: until you accidentally leak your address online to someone who will turn your curiosity into the biggest regret of your life.
Why similar: Thriller 32.3%, First-Person 21.4%, Horror 19.3%, Story Rich 13.3%, 3D 5.5%
Behind the Backrooms is a 1-4 player co-op horror exploration game
Why similar: Thriller 33.8%, Horror 19.6%, Co-op 16.3%, First-Person 12.4%, 3D 8.7%
Escape: School is a 1~6 co-op multiplayer horror game set inside a school where an incident is happening. Cooperate with your friends, find the name of the student who has died and grieve to escape from this school!
Why similar: Thriller 25.7%, Horror 19.2%, Online Co-Op 16.3%, Co-op 14.7%, First-Person 10.2%
Fearwoods is a 4 co-op survival horror where light and silence are your only weapons. Explore the cursed forest, uncover Aveline’s story, evade a relentless demon, and fight for escape before the darkness consumes you.
Why similar: Horror 26.8%, Online Co-Op 20.5%, Co-op 17.5%, 3D 11%, Multiplayer 10.9%
Mutual Occult Insurance is a 1-4 player co-op psychological horror and corporate satire. You are a field agent for the only insurer that covers supernatural damage. Fraud or not, whatever did this has not left the building. Approve or deny the claim… if you live long enough to file it.
Why similar: Horror 21.5%, Online Co-Op 17.6%, Thriller 14.8%, Co-op 14.6%, First-Person 11.1%
Everything is for Humanity is a story-driven, exploration and puzzle-solving based science fiction horror game which sets in a massive science facility in 2020. You will discover tons of things and find out about the blood-chilling truths with its first-person experience.
Why similar: Horror 21.2%, Thriller 18.8%, First-Person 17.7%, Story Rich 11%, 3D 8.7%
P.O.N. is a co-op superhero horror game where you're just another low-level thug in the criminal underworld. Justice never sleeps. Stick together, watch each other's backs, or be trapped here forever. It's already here. Don't let it find you.
Why similar: Horror 32.6%, Co-op 21.5%, First-Person 15.7%, Online Co-Op 13.8%, Multiplayer 9.7%
If you scream, it's game over! A death game linked with a microphone. Can you escape from the closed haunted house?
Why similar: Thriller 28.2%, Horror 25.5%, First-Person 20.2%, 3D 14.8%, Story Rich 10.8%
Sinever: The First Seal is a 1–4 player co-op psychological horror game. Explore an isolated Victorian estate, operate paranormal equipment, manage your sanity, and uncover the truth behind its imprisoned entity before the house claims you too.
Why similar: Thriller 27.8%, Horror 18%, Co-op 15.8%, Online Co-Op 11.7%, First-Person 9.6%
Desserted is a 1-6 player co-op survival horror game. Explore procedurally generated map in your mobile food truck. Gather, cook, and defend your power grid from sabotaging monsters. Complete sacrifices and survive the deadly Blackout when the lights go out!
Why similar: Thriller 30.4%, Horror 18.6%, Online Co-Op 16.1%, First-Person 10.8%, 3D 9.6%
Survive the hunt—find the item and use it before the monsters catch you. Search the darkness, uncover secrets, and face the terrifying truth. 4-player co-op with proximity chat—stick together or be lost to the lurking terror. Your friends are your only lifeline. Will you survive?
Why similar: Horror 23.9%, Co-op 20.8%, First-Person 16.7%, Online Co-Op 15.8%, 3D 10.3%
Bonded Forever is a co-op game that combines horror and puzzle elements. In this game, you and your friend try to go back to the place where you live in your childhood and solve the mysteries that happened while you were away and try to overcome the problems you will face by working together.
Why similar: Thriller 22.8%, Horror 18.6%, First-Person 16.7%, 3D 13.4%, Co-op 8.6%
Cursed Weekend is a game for a group of five players in which: four trapped young people and one sneaking evil. But what kind of evil, this is exactly what you have to find out. Maniac killer, poltergeist, cursed doll, demon or ... You never know for sure.
Why similar: Horror 25.4%, Online Co-Op 20.3%, Co-op 19%, First-Person 14.1%, 3D 7.2%
Welcome to the hell...
Why similar: Horror 22.3%, First-Person 21.7%, Co-op 15%, 3D 15%, Online Co-Op 11.1%
You are a M.E.G. researcher sent into the Backrooms to complete the tasks you’re given. Follow instructions. Don’t ask questions. Explore unsettling, realistic Backrooms levels alone or with a team of up to 4 players. Complete your objectives and do whatever it takes to make it out alive.
Why similar: Thriller 25%, Horror 20%, Online Co-Op 16.3%, First-Person 12.3%, 3D 9.7%
Again and Again is a first-person psychological horror game. How much can a game affect your real life? Enjoy the terrifying moments of being in a realistic home environment and a suspenseful story.
Why similar: Thriller 43.9%, Horror 22.3%, First-Person 15.6%, Story Rich 12.1%, Multiplayer 4%
Paper Dolls Original is a first-person horror adventure game steeped in Eastern culture. You act a man who is separated from his daughter after a car accident. When he awakes, he finds himself in a deserted Asian mansion. Find your daughter and unveil a terrifying story buried for a hundred years
Why similar: Thriller 42.6%, Horror 37.5%, First-Person 8.7%, Multiplayer 5.7%, Action 3.2%
Toy Scrappers is a thrilling chase-based horror game that can be played with up to 16 players. Some players take on the role of a killer attempting to capture others. Escape the madness and stay alive!
Why similar: Thriller 28.8%, Horror 18.5%, Online Co-Op 16.1%, First-Person 10.6%, Multiplayer 9%
Anomaly Express is a 1–4 player co-op psychological horror aboard a winter train. Spot anomalies, survive deadly encounters, and uncover the supernatural force behind this endless journey.
Why similar: Thriller 22.7%, Horror 18.3%, Online Co-Op 15.5%, Co-op 15.3%, First-Person 13%
“Lost Soul” is a multiplayer horror survival game for 1-4 players. Work together to rescue possessed souls, using your surroundings and strategy to fight and escape. Play cautiously to avoid detection while experiencing fear and excitement. Join with others, scream, and defeat the ominous threat.
Why similar: Thriller 35.7%, Online Co-Op 17.2%, Horror 17.1%, First-Person 9.1%, Multiplayer 9%
Tower Inc. is a survival horror of shifting floors, monsters, and betrayal. Collect quotas as fuel to keep the elevator running — without them, you won’t survive the climb. Work with your team… or leave them behind.
Why similar: Thriller 26.1%, Online Co-Op 15.7%, Co-op 14.8%, Horror 14%, First-Person 10.8%
An online co-op horror game for up to 4 players. Complete contracted missions while maintaining your sanity to avoid paranormal encounters.
Why similar: Horror 24.2%, First-Person 22.3%, Co-op 21.2%, Online Co-Op 17.9%, 3D 7.5%
2-player asymmetrical co-op game, Follow Us is a hilarious and horrifying relationship stress test, where one player explores a spooky environment, while another guides them remotely from the van, trying to keep their partner alive.
Why similar: Horror 26.8%, Online Co-Op 22.1%, Co-op 21.2%, First-Person 16.4%, 3D 5.9%
Delete: E.A.D CORE is a 1-4 player co-op survival horror game. Enter an underground data facility, destroy data disks in the correct systems, and escape from whatever is still inside.
Why similar: Horror 22.4%, Online Co-Op 18.4%, Thriller 16.3%, Co-op 9%, Multiplayer 8.9%
An ultra-realistic co-op Backrooms experience for 1–6 players. Backrooms (2026) offers a mix of “classic” and brand-new, all original levels. Explore the levels, discover hidden routes, and cooperate with your team to escape.
Why similar: Horror 26.5%, First-Person 24.8%, Co-op 21.2%, Online Co-Op 15.4%, Multiplayer 10.2%
Developed and published by Levienze Games, this game is a short story based horror and thriller game.
Why similar: Thriller 42.1%, Horror 28.3%, First-Person 27.2%, Indie 2.4%
“Restricted Footage” is a horror and survival game for up to 4 players. You are entering into an area, where reportedly paranormal stuff is happening. Your purpose here is to take a footage with your action cam and to solve the paranormal case.
Why similar: Thriller 23.4%, Horror 18.3%, Online Co-Op 16.3%, Co-op 15.8%, Multiplayer 8.7%
One evening, after leaving work, a young woman goes missing and wakes up in a basement cell. A dark voice from a speaker says: “If you want to escape, you must solve the puzzles.” But this isn’t a rescue — it’s a game. And no one has ever won.
Why similar: Thriller 44.1%, Horror 21.8%, First-Person 21.7%, Action 9.2%, Indie 3.3%
A 1–4 player co-op Japanese horror game. Beyond the torii gate lies an otherworldly labyrinth whose layout changes randomly. Work together to escape as you run from, hide from, and sometimes confront terrifying supernatural entities!
Why similar: Horror 27.5%, Online Co-Op 21.9%, First-Person 15.3%, 3D 12.6%, Co-op 9.4%
After arriving home, you find that no one is home. Strange events begin to happen and you realise that you are not alone. Investigate, search for clues, solve puzzles and find out what has happened to your family.
Why similar: Thriller 39.6%, Horror 22.4%, First-Person 13.6%, 3D 10.5%, Story Rich 8.7%
Psychoscopy is a 5 player co-op horror game that you try to gather evidences about paranormal activities in large areas. Make a team with your 4 friends, take your equipments and hunt down paranormal activities.
Why similar: Thriller 33.8%, Horror 16.1%, First-Person 15.7%, Online Co-Op 11.3%, Co-op 5.9%
Cursed Despair offers a chilling experience where you and your friends will face a mysterious monster, plunging into deep despair. Gather the necessary items to survive, perform the ritual, and stand firm amidst the darkness.
Why similar: Horror 19%, Thriller 18.2%, Online Co-Op 16.6%, Co-op 14.9%, First-Person 10.5%
This time, you're trapped in a convenience store, and it’s nighttime! The difficulty has been raised—find every anomaly and escape through the correct door.
Why similar: Thriller 42.2%, Horror 25.1%, 3D 16.8%, First-Person 13.8%, Indie 2.1%
ShutterOut is a 1-4 player co-op horror game where all kinds of threats await. Record as much as you can, and make it out alive!
Why similar: Horror 24%, Thriller 20.4%, Online Co-Op 18.4%, Co-op 17.4%, Multiplayer 10.7%
Face terrifying enemies from another planet who want to stop you at all costs in this first-person adventure. Explore terrifying and dark settings, solve puzzles and use the objects you find on the map to progress in your adventure.
Why similar: Thriller 33.5%, Horror 21.4%, First-Person 16.7%, 3D 12.1%, Story Rich 11.2%
An online co-op horror game for 1 to 4 players. Find and destroy cursed objects to weaken the ghost before dispatching it for good. Whether exploring alone or with friends, something menacing could be lurking behind every door you unlock, so remember to bring a flashlight and don’t let it get you.
Why similar: Horror 25.3%, Online Co-Op 20.5%, Co-op 18%, First-Person 14.7%, Multiplayer 10.4%
《Homework Is Crazy》is a game that simulates Chinese primary school students doing their homework. Here you will become a new generation primary school student, and face the mountain of tons of homework. This may be the biggest challenge you have ever encountered!
Inside My Mind is a first-person psychological horror game set in an abandoned hospital. Explore dark corridors, solve puzzles, and uncover through notes who you are, why you are here, and the hospital’s dark past.
Why similar: Thriller 41.2%, Horror 27.6%, First-Person 19.9%, 3D 9.6%, Indie 1.7%
Horror Squad is a 1-4 player online co-op horror game. Assemble your squad to clear the areas cursed by terrifying creatures.
Why similar: Thriller 28.9%, Horror 18.5%, Co-op 15.8%, Online Co-Op 13.4%, First-Person 9.5%
Project Screams is a 1–8 player online co-op horror game. Memorize the Daycare, spot the anomalies, and make the right call by voting to progress. Miss an anomaly or make the wrong decision, and you'll be sent back to your checkpoint. How far can you make it?
Why similar: Thriller 31.8%, Horror 20.6%, Co-op 17.7%, First-Person 14.9%, Multiplayer 7.5%