Hidden Online Co-Op Games on Steam
Unlike generic lists, our strategy game recommendations use a rigorous analysis of Steam user reviews to identify and feature only the best, community-validated online co-op games. For those who prefer not to search, check out lists of the most played, top deals and best free to play Online Co-Op games on Steam.
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Emissary Zero
Co-op horror (1-4 players). You are sent to explore a mysterious building at night. Find the Moon and try to return alive.
Unpossess: Exorcism Simulator
Unpossess is a 1-4 co-op exorcism simulator game set in the early 1900s. Players take on the role of exorcists responsible for addressing cases of human possession.
Secret Agent Wizard Boy and the International Crime Syndicate
Use magic spells and military surplus explosives to topple an evil crime syndicate hidden beneath a prestigious wizarding school. Learn spells, engage in espionage, and spread lore-unfriendly chaos.
Cafemart Simulator
Create and decorate your cozy cafe, where guests can enjoy delicious food and drinks. Expand your service with a supermarket offering a wide selection of fresh products, so visitors can not only have a tasty meal but also do some shopping. Play solo or with friends in cooperative mode!
Blood Typers
TYPE TO KILL in this survival horror adventure. Alone or with friends, explore a sprawling cursed film studio as its horror movies bleed into reality. Choose from a roster of characters then plan your escape from this bloody homage to old school horror. But remember... death is just a typo away.
Eyes of War
Eyes of War is a real-time strategy game set in the medieval era, offering both single-player and multiplayer experiences where you can control every unit in character mode. Build your castle, lead your army, and dominate the map. Eyes of War invites you to epic battles of the medieval era!
Dodgy Deliveries
Co-op "Horror" game about running a delivery service with your friends! B̵̨̦͓͖̹̪̥̮͛̀̏̈́̐̔̉Ę̴̤̦̤͓̰̤́͗̚ ̵̨̺͓̱̞͔͉͙̀̂͂͋͠͠Ç̸̫͈̋͋͆̋̾̑̕͜Ä̴̛̟͑͛͋͂̌̕͜͝R̵̛͎̮̜̒̽̈́͂̓̒͘Ę̸͉̙̎̀͐͆Ḟ̶̼͖̭͇̗U̸̡̫͇̤̭̪̦̣̔Ḷ̶̛͖̙͗̋̈̇̕ ̷̡̢͕̦̜͚̌̎̃̔Ā̷̧͇͎̳͔̩̜̤̗͊̋Ţ̸̭̩͚̮͖͇̹̬̾ ̷͍̞̰͈̻̣͚̂̾ͅN̵̛̤͒̏̒͝Ḯ̵̡̘͇̖̏͘Ģ̸̛͙̥̞̽̀͒͜H̶̲̜̺̐̄͋͊̍̈́͘͜T̴̯̲̳̪͚̜̼̈͠
Coridden
Become the ultimate shapeshifter in this hack n’ slash ARPG with action-based combat. Transform seamlessly and customize both your human and beast powers as you level up, find new gear and DNA-strands. Venture out solo or in co-op to uncover the secrets sealed inside a legendary city.
Lonely Mountains: Snow Riders
Crash over and over until you master the mountain in the snowy followup to Lonely Mountains: Downhill. Now also including 2-8 person crossplatform multiplayer - work your way down the slopes together as a group, or risk it all in a breakneck race to the base!
SKIBIDI GYATROOMS
Skibidi Gyatrooms is a 1-4 player co-op horror game. You and the homies just fell into the Backrooms, you must out-GYAT the Skibidi Toilet with max rizz or get flushed. Expect cursed levels, and brainrot that’ll keep you on edge.
Endless Alice
Endless Alice is a third-person action-adventure game combining Roguelite elements, anime aesthetics, and endless possibilities. Choose characters with unique combat styles and embark on adventures! Play solo or with friends in cooperative challenges for up to 4 players!
Nine-Ball Roulette
This will be the most thrilling pool game you have ever played. Join up to 3 of your friends in this exciting pool roulette game! Eliminate each other with pool until only one person is left.
Warden's Will
Warden’s Will is a fast paced movement shooter roguelite, playable solo or in up-to 3 player co-op. Choose your Warden, master unique movements and abilities, and overpower hordes of robots in intense battles. Fly, dash, smash, and turn bullet-hell into bullet-heaven!
Tank Arena:Total Operation
Tank Arena:Total Operation is a free MMO war game where you play as a commander, drive thousands of types of tanks, armored vehicles or helicopters on a massive battlefield engaging in 12v12 team-based battles against players globally. Enjoy the fun!
Wild Woods
Wild Woods is a couch co-op game full of action, teamwork and woodland critters. One to four players take on the role of brave little cats defending their wooden wagon on its way through a dangerous forest. Clever cooperation is key - their way is full of obstacles!
Entropy Survivors
Entropy Survivors is a bullet hell roguelike where you simultaneously control a powerful mech and a sharpshooting space frog, featuring outrageously creative abilities and powerful weapon customization. Save the universe in single player or 2-4 player online co-op!
Relic Dudes
Defeat hordes of enemies, alone or with up to 4 friends! Work together or mess with them on this online multiplayer survivors style roguelike, where you create unique builds that can change the fate of your team.
The Anomaly Project
Your goal is simple, spot anomalies to escape. Play alone or together with up to 8 players in online co-op. Make the right decisions to advance to the next level, or risk being reset to the beginning!
ICBM: Escalation
ICBM: Escalation is a grand RTS where you command armies, develop cutting-edge tech, and wield devastating weapons. Conquer enemies with conventional forces or nuclear firepower. With new modes like Standoff and Conquest, the game offers deep strategic layers in a global warfare setting.
In Sink: A Co-op Escape Adventure
Work together to solve puzzles and escape a desert island in this stylized multiplayer co-op adventure. Success requires more than just you and your partner thinking alike - you'll have to communicate and stay In Sink to overcome the challenges ahead.
Atomic Picnic
Third-person bullet heaven meets explosive co-op action! Swing, dash, and blast through monster swarms while combining upgrades and discovering rare evolutions to create game-breaking builds of destruction.
Super Mining Mechs
Build your own Super Mining Mech and explore the underground in search of new natural resources. Customize your mech with unlockable parts to dig deeper than ever - by yourself or with up to 7 friends in online co-op multiplayer! So, what are you waiting for? There’s mining to be done!