Top similar games like O.S.A.:

A raccoon co-op horror extraction game. Infiltrate procedural ruins, loot everything and extract the relic. Mammon, the Greed Demon, is watching… Stay away from his curse!

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.

A multiplayer co-op horror-lite physics comedy where you play as lab-grown slime mold samples. Spread, digest, recover energy, submit results, and survive a research protocol that clearly passed approval by mistake.

Enter strange, unpredictable dimensions with up to 8 players to grab artifacts and survive the chaos waiting inside. Showcase your loot in your private museum, unlock new machines, and gear up for your next dive. And please, shower between missions. Management insists.

S.M.P.C.U. is an online co-op horror game for up to 4 players. As a member of the "Special Monster Pest Control Unit" your job is to remove extraterrestrial Monsters that have infested the pantries of fast-food restaurants. Work together to find them, trap them and get out. Don't wake the Monster!

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!

Online co-op horror for 1–6 players. Board a cursed flying ship, raid haunted graveyards for loot, and survive monsters that hear every sound. Beware of UFO abductions, grab boosters from vending machines, gamble in the onboard casino, and embrace pure chaos with friends in voice chat.

A multiplayer co-op horror-comedy where every mission is a disaster. Panic, miscommunication, and your own friends will kill you faster than the monsters.

Your ride is dead, and rough waters lie ahead! Survive aboard a musty boat in a totally chaotic co-op. Collect scrap, patch up leaks, swap your catch for cold brews, and use harpoons to break the laws of physics!

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.

Forest Escape: Last Train is a co-op surreal horror game for 1–4 players. Explore bizarre nightmare locations, gather resources, solve the insane Warden's twisted puzzles, and keep your locomotive running as you fight to escape his unhinged world.

An arcade-style obstacle-dodger set in a satirical mega-warehouse. Sprint, juke, and react fast through randomized chunk layouts, semitrucks, falling boxes, and other mayhem. All in the name of Shareholder Value!

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.

A 4-player co-op horror comedy where you drop in as couriers delivering packages in a dystopian world ruled by grotesque monsters. You share 99 lives - deliver, don’t die, and make it count!

Grab your crew for a high-stakes co-op horror run. You have 5 days to meet the quota. Haul valuable and dangerous, cargo from procedural levels and surreal, shifting dimensions. Survive deadly entities and daily Galactic Events. Get paid. Get upgraded. Survive the week.

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.

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.

Traped in a co-op horror game where the only way to evade death is by mining your way out. Navigate using rails fight using a machine gun and collect equipment along the way. Play solo or with friends and see if you have what it takes to survive.

A 6-player co-op horror game where you loot valuable relics from nuclear wastelands to satisfy the perfect AI, KUT-ANA. Survive deadly anomalies and evacuate before you’re recycled.

An online co-op horror experience for up to 4 players. Use your elastic arms to grab valuable loot for your captain. But be careful, danger lurks around every corner trying to take your booty!

A spooky co-op survival game for up to 5 players. Explore shifting worlds, mix crystals for Statue demands, gather resources, and survive chaotic encounters where heavy hits trigger physics-based bone reactions.

Dig, trade, and survive in this pixel-art roguelite. The darkness drains your life, but your voice is your shield: Speak into your microphone to ward off the shadows! Fill your daily quota to upgrade your gear, or face the wrath of the Cave Troll. Remember: Silence brings death.

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.

An online co-op horror game where you mine for gold with up to 5 players. Venture into dark tunnels, recover lost equipment, set off explosives, and uncover secrets as you descend into increasingly dangerous caverns in pursuit of the eerie unknown at the bottom.

An online co-op horror game for up to 4 players. In the pit, the creatures are the loot. Hunt them or capture them alive, then send them up to get paid.

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.

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. 8-player Co-op Mode. 16-player Traitor Mode

An online co-op PC/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.

A chaotic co-op horror game for up to 6 players. Scavenge eerie environments, feed your loot to a hungry steam engine, and pass Boomer between teammates in a deadly game of hot potato.

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?

Monkey Jump is a physics-based co-op horror game for up to 4 players. Collect bananas, escape from the creatures, and survive the chaos with your friends.

You wake up in hell. You are incomplete, confused, and your friends might be your greatest chance — or your biggest problem. In this dark comedy co-op adventure for 2–6 players, use your limbs, solve puzzles, and find out who reaches the exit.