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.
Filters & Lists
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!
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-based roguelite shooter you can enjoy solo or up to 3 friends. Pick your Warden, try out different builds, and jump into chaotic arenas filled with unpredictable robots. The game challenges you to move smart and react quickly and try new builds with every run.
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.
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!
Guardians of the Sanctree
You and allies, avian inhabitants of Sanctree City, build structures and production lines on the tree, crafting weapons to fend off subterranean insects. Defense is just the start—dig deeper, destroy nests, fortify new defenses against escalating threats for an impregnable stronghold.
Axon TD: Uprising - Tower Defense
Axon TD lets you expand the map boundaries themselves. A huge arsenal of towers and a wide variety of enemies clash in a battlefield that grows to your whims. Engage in single, cooperative, and roguelite gameplay.
Ultimate Zombie Defense 2
4-player co-op, zombie slaying, base building, boss battling mayhem! Cleanse the infected wave by wave and upgrade your base with traps & defenses in Ultimate Zombie Defense 2!
63 Days
Coming of age as a part of the first generation born free, WWII stripped me of my family, home, and future. Now I'm left with only one choice: to get my revenge and independence, or die trying. The odds are against us: will our tactics, stealth and teamwork be enough?
Intoxicated Driver
Get ready to drink and drive (safely). Challenge friends in multiple drinking and driving game modes, like drunk cop chases, pedestrians, races, capture the flag, hot potato, and more! With options to change the style of play, there is so much drunk driving fun!