433 Massively Multiplayer · Online co-op games your group can play together online, including Stone Simulator – Just Be a Rock, Avakin Life, and SCUM.
All games: 24
Stone Simulator is a meditative idle game where you live as a rock enduring endless seasons and absurd events. Survive storms, unlock quirky achievements, and observe a serene, ever-changing world. Perfect for Zen-like relaxation or meme-worthy humor.
Avakin Life is an endless social world waiting for you. Live your dream life, from unique and customizable avatars to stylish fashion outfits and personalized dream homes. Hang out with friends, join parties, and embark on adventures in a world where you are in control of everything.
Welcome to SCUM, a ruthless open-world survival game where deep character customization defines the prisoner you become. Loot, craft, hunt, build, and fight to outlast a hostile island where every choice can change your fate. Stay alive. Stay dangerous. Become harder to kill.
PLAY, CREATE, PARTY! Tower Unite is a community-based virtual world party game with online games, entertainment, activities, and absolutely NO microtransactions.
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.
Join this free-to-play PvP online naval shooter with fast-paced combat, easy-to-learn gameplay, intuitive controls, and cross-platform play on Steam, console, and mobile. Choose from 600+ warships and 150+ Commanders, and master tactics on diverse maps. Play now and become a legend!
《决战沙城》是一款自由打装备免氪金的传奇对战游戏，以其独特的游戏玩法和丰富多样的内容，吸引了众多玩家的关注。在游戏中，你将进入一个充满挑战和竞争的世界，与其他玩家展开激烈的对战，争夺珍贵的装备和资源，成为传奇战士的最终王者。快来加入这个充满挑战和竞争的游戏，展现你的实力，成为传奇战士的最终王者吧!
Dune: Awakening is a single- and multiplayer Open World Survival game with immersive adventure and RPG gameplay. Explore, build, craft, and unravel a cinematic Dune story as you rise from survival to greatness on the most legendary planet in the universe. Just remember: the sandworm always comes.
Survive the chaos of SCP Foundation! Step into a thrilling SCP horror experience with story-driven co-op, intense PvP Breach mode, and randomized maps. Play as Class-D, scientist, SCPs, and more, each role bringing unique challenges in an unpredictable, immersive facility.
Adventure awaits in Kathana, a classic MMORPG. Choose from eight distinct classes, complete quests with friends, challenge powerful bosses, explore dangerous dungeons, and compete in guild wars and PvP battles.
Myth of Empires: Throne is a free seasonal multiplayer warfare sandbox. Explore vast lands inspired by multiple civilizations, tame creatures, forge powerful weapons, and build your guild. Lead cross-server expeditions, conquer territories, and compete with players worldwide for the ultimate throne!
Gather your friends and dive into the action-packed Battle Royale, Squad Fight, or Hot Zone like there's no tomorrow! Blood Strike offers a wide range of playable Strikers, each with a unique active and passive ability letting you deploy drones, shield walls and everything in between.
DEADSWITCH COMBAT is a fast-paced 2D multiplayer shooter. Experience action-packed combat with hundreds of weapons, vehicle combat, and plenty of team-based game modes.
You survived a helicopter crash; going home is your top priority. Live as a castaway - survive the dangers of the islands by using your environment to find food, build shelter, craft tools to extend your stay, explore the secrets of the islands and their surrounding waters, and carve your way home.
C.A.S.T is a third-person PvE extraction shooter playable solo or in co-op. Select your character and loadout to battle enemy hordes, evade anomalies, and complete objectives across handcrafted maps with dynamic procedural elements.
Fight and train with powerful Jutsu to rise through the ranks of your village in a ninja open-world MMORPG. Join over a hundred thousand players worldwide. Play now for free!
Hardcore open-world survival where preparation is everything. Scavenge, craft, fortify during the day. When night falls, the infected hunt in numbers. Play solo or with friends in a brutal post-apocalyptic sandbox where survival is earned through smart decisions. How many Nights will you survive?
A HARDCORE physics-based 1-4 player co-op RAGE GAME about getting home after a wild night out. It was a fun night! Now grab your buddies and walk home. IF YOU REMEMBER HOW.
Craft. Battle. Grow. Join thousands of players in the ultimate tactical RPG where every piece of gear is forged by you — and every fight tests your strategy.
Love x Comedy x Isekai = The Ultimate Bishoujo RPG! Welcome to the wild world of Dragon Traveler!
A Souls-inspired action RPG set in a sandbox open world with an MMO feel and challenging directional combat. Play solo or with up to 3 friends in co-op. Build friendships, master an unrestricted class system, and uncover the cause that darkened all eyes.
WEBFISHING a multiplayer chatroom-focused fishing game! Relax and fish (on the web!)
Marvel Rivals is a Super Hero Team-Based PVP Shooter! Assemble an all-star Marvel squad, devise countless strategies by combining powers to form unique Team-Up skills and fight in destructible, ever-changing battlefields across the continually evolving Marvel universe!
Path of Exile 2 is a next generation Action RPG from Grinding Gear Games, featuring co-op for up to six players. Set years after the original Path of Exile, you will return to the dark world of Wraeclast and seek to end the corruption that is spreading.