Top similar games like O.S.A.:

An online co-op horror game with up to 6 players. Locate valuable, fully physics-based objects and handle them with care as you retrieve and extract to satisfy your creator's desires.

If we say the wrong words... WE DIE! This game kills you with your own voices! Online co-op where everyone gets a forbidden word, say it and you kill your friends. Explore spooky dungeons, cast spells and defeat monsters with your voices.

Thousands of players leave notes to guide—or troll each other through a weekly dungeon to reach FLOOR 100. Play with up to 4 friends, but work together as a community to reach FLOOR 100! A shorter, daily changing dungeon is also available!

PANICORE is a survival horror game that mixes permadeath, AI monsters and a co-op experience up to 5 players (4 players in demo). Try to escape and don't get caught, but beware: they don't only hear your steps, but also your voice.

Co-op for 2–4 players. Carry physics-based objects, complete tasks, and move up floor by floor. Watch out for glitches and remember that time is limited. Your internship ends with either a job offer or a full reset.

Immortal Emptiness is a first-person shooter with roguelike elements in which you get to navigate a deathless post-apocalyptic world and fight endless battles against nightmarish foes. Explore, fight and unravel the mysteries of a world where mortality is but a fleeting concept.

The Maze Project is a psychological horror game set in a dark, creepy maze. Unaware of how you found yourself here, you must escape from this twisted nightmare. Survive from the dark manifestations that lurk around the maze waiting for every opportunity to get you, and uncover the hidden secrets.

CHAINED BACKROOMS is a horror game where players are chained together, forced to survive and explore procedurally generated Backrooms levels. Only coordinated teamwork can help avoid dangers and find an escape. Co-op for 1-4 players.

Embark on an epic journey through the 9 Realms! Immerse yourself in a 3D Multiplayer Viking Fantasy, combining Dungeon Crawling and first-person melee extraction. Customize your hero, raid treacherous dungeons, and pillage the loot off your fallen enemies.

An online co-op VR horror game for up to 4 players. Team up in haunted kitchen arenas to craft enchanted confections and break the witch’s curse while battling relentless baked beasts that storm the kitchen to stop you.

An online co-op horror game for up to 8 players. Collect what matters, stay silent, and survive as sound and light lure the creatures closer every second.

You’re deep in debt. Pay your quota in 3 days or end up like chum. Dreadline: Net Quota is a 6-player co-op horror fishing game. Fish or Die.

Wraithgate is a brutal 4-player co-op shooter where death is permanent. Descend into ever-darkening realms filled with grotesque monsters and relentless horrors. Limited resources, no respawns, only survival. Work together, fight hard, and escape—if you can. The Wraithgate never closes.

A co-op horror game for up to 4 players. Grab chickens 🐔 in monster-filled realms, haul them back to the train, and complete your quota. 💀 Die? You’ll reincarnate as a panicked chicken, scrambling to survive. Work together to complete your quota or face the Colonel’s wrath.

Gather up to 8 players and dive into chaotic procedural dimensions to collect artifacts for the Owner’s peculiar galleries. Expect weird gravity, killer plants and nonsensical anomalies. If anything happens to you, somebody will take the next shift.

They came; they died. Now it's your job to clean up their mess.

PEAK is a co-op climbing game where the slightest mistake can spell your doom. Either solo or as a group of lost nature scouts, your only hope of rescue from a mysterious island is to scale the mountain at its center. Do you have what it takes to reach the PEAK?

A 1-4 player survival horror game where you collect evidence while trying to escape a strange mist. With the mist surrounding you, and mutants hunting you, will you survive with the evidence you have, or fall victim to the mist yourself?

Trapped in a decaying forest facility, you and your friends must escape. One of you is a hidden threat. Use voice chat to survive or deceive—but the entities hear everything. They mimic, stalk, and strike. Every sound matters. Every trust is a risk.

Backrooms Cycle is an immersive exploration RPG/FPS horror set in the backrooms. You will explore and scavenge, build up your arsenal and gain powerful perks. Decide if you want to rescue fellow scientists, build an outpost in the poolrooms or just care about yourself.

Backrooms: Infinite Halls is a game about investigating and researching the Backrooms, going deeper and deeper down these unending spaces, roaming their halls and avoiding their horrors.

Get ready to face a formidable challenge in this cooperative horror game for 1 to 4 players. Explore the Ravenwood cemetery, dive into the memories of the dead, and try to steal their treasures… all while surviving relentless threats, where a single mistake can be fatal.

A slightly different Backrooms is a Coop or Singleplayer Horror Puzzle Game. Encounter different Monsters and Levels than in the other Backrooms, but brace yourself for the same bone-chilling atmosphere like the typical ones.

Just Work is a first-person horror game set in a massive industrial complex owned by the enigmatic corporation EternaTIMA. You’ve just accepted a suspicious job offer, desperate to make money for your mother’s hospital bills—but this facility holds secrets you were never meant to uncover.

Disquiet is a multiplayer co-op game (up to 4 players) where you and your friends became ghost hunters.The main goal of each mission is to identify and potentially exterminate the ghost using hunting equipment that is upgradable with experience points.

🔪Stab It VR🔪 the VR game that CUTS to the PRANK ⚔️ What's bigger than VR? Videos of people in VR looking like fools 😂 Record your friend, dad, or grandma playing Stab It VR for a laugh 🎥

Online co-op horror game where up to 6 wizard minions go into an archmage’s tower. Use an assortment of spells to vandalize, break and steal - but beware the horrifying magical creatures that roam the halls.

In Burning Out, a multiplayer maze-escape game, you and up to 3 others are trapped in a dark maze, armed only with fire. Light your way with your torch to unveil the maze’s secrets, all while trying to keep contact with prox chat. (it is highly recommended to play with others)

Sorry, Wrong Door is an online co-op game for 1-4 players. Trapped in a haunted castle with a powerful demon hunting you. Explore the ever-changing castle, slay monsters, fight boss battles, uncover clues, avoid traps, and use powerful weapons to escape.

Lunch Lady is a 1-4 player online co-op survival horror game. The school final exams are coming up and the best idea you and your friends had was to steal the test answers. Find all 10 pages and don't get caught by the murderous Lunch Lady!

Experience 12 all-new games made exclusively for this unique horror anthology. Explore a mysterious castle that changes as you play. Keep your wits about you as the line between cute and creepy begins to blur. Uncover the next chapter in the ongoing Dread X Collection storyline.

Explore a abandoned town, filled with mysteries and creatures capable of ending your life. Uncover what really happened. Dive into the story mode, or raise the stakes in the replayable gamemode 'Hunted'.

co-op (1–6 players). close the VENTS, manage resources, and explore dark, procedurally generated sectors filled with unique enemies and upgrades.

We Gotta Go is a co-op horror-ish game where you have to find the bathroom before you S#!T your pants! Desperately search a haunted mansion, grabbing items, battling ghosts, and managing your gut on a supernatural hunt for sweet relief.