1,795 Action · Online co-op games your group can play together online, including Outlive 25, Lucid Cats, and ATMOSFAR.
All games: 24
Build your base, prepare your troops, and face your most epic battle yet in this old-school real-time strategy game. Choose between two factions, test your skills in three epic campaigns and engage in online battles with up to 16 players simultaneously.
An online co-op horror extraction game. Fall asleep, loot a shared nightmare, and find the escape to keep your valuables.
Uncover the fate of humanity's final outpost as you survive and explore a thrilling world of floating islands. Brave the skies on your own or assemble a squadron of friends, and scavenge scrap to engineer and upgrade flying vessels, bringing your airship along for the journey.
Command the legendary gunship in a high-octane action-roguelite! Engage insurgents with devastating firepower in ever-changing missions. Upgrade your arsenal, adapt to dynamic challenges, and survive relentless waves of enemies. Every run offers new tactics and chaos as you dominate the skies.
A 1-3 player co-op puzzle horror game set in an accursed megastore. Work together to decode the store's twisted logic, and find a way out before the lurking horrors doom you to shop forever.
Eterspire is a cozy old-school MMORPG where skill and dedication define your progression. Grind for gear, explore the vibrant world of Aetera, discover new content every two weeks, and join a growing, welcoming community in a free-to-play MMO with PC and mobile crossplay.
Plunge into high-stakes punishment platforming in JUMP KING QUEST! Explore alone or fall together in dynamic online climbing action as you fight your way upwards on an unhinged quest to The Smoking Hot Babe at The Top. In this world, every ledge is a battlefield…
Dungeon Brawls is a 1–4 player action roguelike. Choose from dozens of heroes, combine hundreds of skills and relics, and create powerful builds as you fight through waves of enemies and bosses—solo or with friends.
Step into Guild Wars Reforged, the award-winning online roleplaying game enjoyed by millions, now re-energized with system enhancements and Steam Deck verified. Experience the complete saga— from the fall of Ascalon to the desperate stand against Nightfall. Your adventure is just getting started!
Embody your inner power-tripping TSA agent and hunt down other players attempting to blend in and smuggle contraband past you. Control the crowd and your problematic K9 with authoritative voice commands, and use "compliance devices" to apprehend smugglers making mischief or hiding in plain sight.
In the third game in the dark samurai action RPG series Nioh, you will need to use both Samurai and Ninja combat styles in your battles against formidable yokai as you explore a thrilling open field.
Roadside Research is a 1 to 4 player co-op gas station simulator. Except you’re aliens. And undercover. Do very human things like restocking shelves while preparing for the invasion. Just don’t get caught.
Korea. IL-2 Series is a next-generation flight simulator set during the Korean War. Climb into the cockpit of early jet fighters and shape the outcome of legendary aerial battles.
A 1 to 4 player Y2K dream-exploration game. Free your imaginary friends trapped to eternal sleep by the goddess Mama. Collect cursed items and use weapons to face the monsters in Mama's dreams.
Abiotic Factor is a survival crafting experience for 1-6 players set in the depths of an underground research facility. Caught between paranormal containment failure, a military crusade, and chaos from a dozen realms, the world’s greatest minds must survive against the universe’s biggest threats.
Zombie Assault: Resurgence is an intense, action packed top-down shooter, featuring deep RPG elements. Customise your loadout with unique upgradeable weapons as you gear up to take on hordes of enemies. Play solo or team up in co-op with up to 4 players.
StarRupture is a first-person open world base-building game with advanced combat and tons of exploration. Play alone or in a group on this sublime and ever-changing planet, extract and manage resources, create your complex industrial system and fight off hordes of alien monsters.
VEIN is a post-apocalyptic survival multiplayer sandbox game. Gather supplies to survive, explore abandoned buildings, defend your home, and rebuild society, whether alone or with friends.
Severance is a 1-5 player paranormal investigation game… with a twist. Use tools and equipment to identify the correct ghost type while a dangerous, violent entity hunts you down. The twist? YOU can become the ghost. Choose Ghost AI, or an asymmetrical mode where a player takes the Ghost role.
Battle your way to victory in this 1-4 player co-op hack-n-slash dungeon crawler. Play as a dynamic cast of heroes slicing their way through dungeons, earning weapons and loot. Rampage past a gauntlet of enemies and destruction to end the evil Lord Dinglepus' reign!
No packages? No problem! Break in. Scrap everything. Deliver... A chaotic online co-op game for up to 5 players (or 15 if you really want to)!
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?
33 Days till Extraction is a top-down sci-fi action RPG shooter with roguelike progression. Harness brutal firepower and necromantic skills to survive.
A magic-themed co-op horror game where you and up to 5 friends are minions summoned by a wizard to break into their rival's towers to cause mayhem. Try to fufill your vandalism target with an assortment of spells while avoiding magical beasts and monsters that protect the tower.