オンラインでみんなと遊べるアクション（Co-op）ゲーム1,686本。SEVERANCE、Absolum、Anomaly Companyなど。
すべてのゲーム: 24
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.
Fight as the outcast heroes of Talamh in a fierce battle to retake magic from Sun King Azra’s grasp in Absolum, an original roguelite beat ‘em up by Dotemu.
You and your crew are sent in to assess reality in this 4-player co-op horror game. Memorize the environment. Spot disturbing anomalies. Decide if the timeline is safe. One bad call—and you’re forced to start over.
A survival horror set in a massive maze. Play solo or 6-player co-op. Scavenge resources to craft gear and survive against terrifying enemies. Unlock unique abilities and find the exit.
MISERY is a 1–10 player co-op survival game set in a nuclear disaster zone. Here, every day is a struggle: search radioactive ruins for resources, build your bunker, craft weapons, and explore a weird, procedurally-generated world with your friends. Beware of anomalies, monsters, and armed bandits.
Fight hordes and defend your Stronghold in a bullet heaven survivor-like with co-op and tower defense. Gain power-ups every level, collect random artifacts from chests and grow stronger to survive, defeat the boss and claim a top spot on the Sineus Arena leaderboards!
Oxygen Train is an open-world survival train game. Wake up in a world lacking oxygen. Chop trees, mine, gather resources, upgrade your unique train. Survive by planting, fishing, farming, exploring, fighting. Build your train kingdom. Supports 1-16 online co-op.
Friendslop survival extraction horror game about desperately looksmaxxing against a rising quota. Raid nightly frat parties for questionable gear while something inside hunts the ugliest player. Cook peptides, try risky procedures, and reach True Adam before it drags you into another room.
Grenades are holy relics. Shotguns are spellcraft. In this top-down survival action-RPG, discover a fantasy realm invaded by modern world and destroy nearly everything. Scavenge artifacts, forge weapons, build outposts, brew potions, and hunt the corruption devouring the land. Play solo or co-op.
No More Room in Hell 2 is an intense 8 player zombie shooter. Overcome the endless undead. Avoid infection. Survive hell together.
Lead a medieval restaurant with a team of rats like you! Cook the food, throw it at the guests, wipe the drinks under the skeletons! Become a legendary rat chef, proving to orcs and vampires that the most delicious bloody meat is served in your restaurant!
Invincible VS is a brutal superhero 3v3 tag fighting game set in the Invincible universe, where you can battle to the death as a team of fan-favorite characters in iconic locations.
Can you Survive the Swarm? Unlock mighty abilities and upgrades, find and collect Tems to evolve and become stronger, discover overpowered strategies, and battle massive bosses in this survivor-like bullet heaven! Play solo or online co-op with up to 3 players, building the wildest synergies.
In up to four player co-op, form a group of explorers searching for treasure. In this cursed jungle, danger is everywhere and monstrous creatures alter reality. Stay clear-headed and tame the jungle before it devours you…
A chaotic 2-player co-op road trip. Share the controls of a pedal car as tourists: sit on the left to turn left, sit on the right to turn right! Coordination is key!
A co-op fantasy adventure where your voice is magic. Play as cat wizards, cast spells by shouting into your mic, explore fairy-tale worlds, fight monsters, and return to your hot-air balloon loaded with loot.
SHRIMP GAME: OVERKRILL is a solo or multiplayer third-person shooter RPG set in an abyssal realm. Pilot your SHRIMP platform to fight giant sea monsters, master elemental classes, and unearth secrets in a 6-person co-op campaign, or just krill your friends in multiplayer PVP!
From small-time dope pusher to kingpin - manufacture and distribute a range of drugs throughout the grungy city of Hyland Point. Expand your empire with properties, businesses, employees and more.
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.
In this survival horror, you're surrounded by sea and a towering gate ahead. Walk into the maze, hunt, gather, and run to survive, alone or with friends. Remember: You're not the only one starving...
Cargo Hunters is an extraction shooter where you control a humanoid robot scavenging the remains of humanity on an abandoned, dystopian Earth. Play solo or in 4 players co-op.
A cosmic battle awaits! Choose between 15 Marvel Super Heroes in this frenetic action beat ‘em up to fight against the deadly Annihilation Wave threatening the galaxy. From New York City to the depths of the Negative Zone, the future of the Marvel Universe will be fought for across the stars!
The official hololive rhythm game and RPG -- hololive Dreams -- is now on Steam! Enjoy rhythmical gameplay, park development, and mini-games. Featuring 50+ members and 150+ songs, it's perfect for fans and newcomers alike. Play your way!