Top similar games like Thalassomania:

OverNight is a multiplayer co-op Ghost Hunting horror with multiple Ghosts per session. Explore some of the most haunted locations with your friends, using a variety of paranormal equipment, engage in rituals, and attempt haunted communications to connect with the other side.

Phasmophobia is a 4 player online co-op psychological horror. Paranormal activity is on the rise and it’s up to you and your team to use all the ghost-hunting equipment at your disposal in order to gather as much evidence as you can.

7 Sins is a 1-4 player co-op psychological horror game. Search for their items and destroy them in a ritual to stop the creatures. However, whoever touches an item falls victim to the curse of that sin and becomes trapped in mental hallucinations. Resist the curse, solve the mystery, and survive!

Co-op psychological horror for 2-4 players. You're all in the same room — but you don't all see the same room. Describe what you see, find the anomalies, seal them before time runs out. When the portal opens, it judges each of you alone.

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.

Final Night At Hotel is a horror game for up to 5 players. Together, you must investigate the creature haunting the hotel, collect clues, and vote each night for determine the strategy to defeat it. When night falls, your goal is clear: kill or exorcise the creature...

Voiceless is a cooperative horror game that can be played alone or with up to 4 players. Your goal is to survive making as little noise as possible, because any sound, including your microphone, can be heard by the Maniac, who is eager to catch you and your friends.

Use the specialized equipment at your disposal to locate & log as many paranormal events as possible. Decipher the ingredients needed for your ritual and try to exorcise any demons within. Any incorrect ingredients and you may never leave! 1-4 Players

An online co-op horror game where you pacify, weaken and capture supernatural creatures for PAH Inc. Each level has a different story, unique monsters, and multiple endings. Play single player or together with up to 6 friends. Includes proximity voice chat with fun effects.

You’re a toast in this co-op horror game. Your job is to investigate haunted kitchens, use ghost-hunting equipment to track down paranormal activity, exorcise possessed appliances, and save a fellow toast from getting sliced.

Step into the haunting world of Stranded Souls, A co-op horror game designed to challenge your wits and test your courage, this game lets you gather up to 4 players to face the unknown, unravel mysteries, and survive the horrors that lie ahead.

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.

The Backrooms - Nightmare Dimension is a Co-op online horror game with up to 4 players, where you and your friends take on the roles of soldiers who are part of the SCP Foundation with the mission to eliminate the mysterious entities found in the infamous place called "the Backrooms".

Explore abandoned locations with 1–4 players. The creature hunts, captures, and imprisons you — your teammates must find you before it's too late. Can you escape together?

Give Us A Sign is a 1-4 player co-op psychological horror simulation. As an investigator, use specialized equipment to detect entities and gather evidence in haunted locations. Every word you speak shapes the haunting around you. Once you ask for a sign, there is no turning back.

Pneuma is an online co-op sci-fi paranormal investigation experience for up to 4 players. Operate advanced paranormal tech to investigate, analyze, and outmaneuver deadly entities before you are possessed.

Use echolocation to hunt your friends down in an asymmetrical horror game where sound is everything!

Gather your courage and face the ghost danger.Clean the curses and hunt the ghost!

Take control of the Murder Wagon investigation team and cooperate to solve the world’s strangest cases in this asymmetrical co-op horror game.

"Lost Lullabies - The Orphanage Chronicles" is a Co-Op horror game set in 1980, inspired by the real stories of an orphanage ruined by a fire in 1960 Lowell. Playable with 1-4 players, the goal is to identify and expel malevolent spirits alone or with your team.

The Haunted Riddle is a 4 player psychological horror. Trapped in a mysterious mansion with your friends, choose from unique characters with different perks and professions. Explore hidden passages, solve puzzles, and uncover the house’s dark secrets, all while dark forces work against you.

Deadly Broadcast is a co-op horror and survival game that can be played with 1-4 players. As a Famous Streamer, you have to stay alive, but at the same time you should stream the paranormal events in the cursed places to gather more donations and more viewers. Don’t die! Don’t cut the Broadcast!

Holy Purge is a co-op horror game where players play as priests who exorcise demons in various scenarios.

Trapped in darkness, hunted down—your only way out is the right keycard. In this intense co-op multiplayer horror game, you and up to 4 friends must search terrifying maps, evade deadly villains, and escape before time runs out. No weapons, just wits. Can you survive?

In this co-op horror game, escape an unknown realm where reality is shattered and dimensions collide. Solve puzzles, avoid deadly entities, and uncover the hidden saboteur.

A 4‑player co‑op horror about surviving the abandoned laboratories of Project Mirny. The echoes of forgotten experiments still patrol the perimeter. Adapt, stay tight—and march into the very heart of the nightmare. Orders are orders. Fear is certain, fun inevitable.

The Demo & payable both have the same content. Blessed Curse is a 4-player, online co-op, psychological horror game. Take on a rumor you've received of a haunted location in Japan. At the scene utilize your entity-hunting equipment to gather evidence and figure out what might be residing there.

An online co-op horror game featuring unique playable characters and RPG mechanics. Exorcise ghosts using your special abilities and tools while surviving the supernatural onslaught

Investigate, explore, and solve paranormal phenomena using technology as well as your own esoteric abilities, alone or with friends.

3-player asymmetric co-op horror. Identify the Entity that reacts to how you behave. Investigate in the field as an Agent, or coordinate from the Safe Room as the Operator. Close the breach before everything becomes The Static.

Midnight Moving Crew is a 1-4 player co-op horror sim. Clock in, pack the house, and survive the shift. Buy EMF detectors and defensive wards to repel any entities in the house before you become the next permanent resident.

Enigma Manor is a 1-4 player co-op survival horror game. Navigate your way through the procedurally generated manor, fend off monsters, solve puzzles and find a way to escape.

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.

This is a Ghost is an FPS psychological horror and investigation game for 1 to 4 players. Track down supernatural activity, identify demonic entities using specialised equipment, and banish them with crafted ammunition in solo or online co-op!

SCP: Retrieval is an indie multiplayer action horror game set in the SCP universe. You will play as a Mobile Task Force unit sent to retrieve dangerous anomalous creatures after a massive series of major breaches.

Exorcist Simulator is a 1‑4 player online co‑op horror where every play asks the same, terrible question: Will you cast out the Devil —or wear his skin?