Top similar games like COS-MOS:

Rescue abandoned toys and find your way back to your owner in this thrilling co-op action adventure! Evade those who seek to break or discard you by using the ultimate survival tactic: stop moving and 'Act Like Toys!' to blend in.

Steer the jar with your pickles inside. Roll through trap-filled courses! A 1–4 player physics-based co-op chaos: clear obstacles without shattering the jar, return to checkpoints, and try wild tactics with friends. Easy to learn, hard to master.

Bitter Critters is a multiplayer Co-op roguelike pub crawling game. Explore procedurally generated towns and dodge silly obstacles!

Hadalis is a co-op deep sea survival game where every mistake can be fatal. Alone or with a crew, descend into the hadal zone while keeping your fragile submersible intact as pressure, creatures, and failing systems push you to the brink. Will you endure the abyss?

Medieval Thieves Academy is an online co-op stealth game with proximity voice chat for 2 to 4 players. Sneak through castles and mansions, steal every treasure you can carry, and spend your loot between runs on stat upgrades and tools. Push as far as you can, efficient or not.

In What The Coffin, you and a friend face the wildest challenge: hauling a wobbly corpse through a chaotic world of physics-based obstacles! It’s all about coffin-cooperation. If you drop it, you're both going six feet under! Can your friendship survive the madness?

Dung Ho! is a co-op physics game where you and your friends are dung beetles rolling a (dung) ball into a hole.

A co-op adventure about carrying your king back to your goblin stronghold with up to 3 of your goblin friends. Sadly the king isn't being very cooperative as he's dead.

Gigils is an action packed multiplayer game where players will take on the role of cute alien creatures that bite, evolve, and brawl to capture control points. Choose your class, devour bugs or enemies to unlock powerful abilities, and grow stronger. Alien mayhem has never been this delicious.

Sky Pirates is a cooperative steampunk pirate adventure game. Sail aboard a flying ship, explore islands, and transport treasures for a pirate organization… all while avoiding celestial dangers!

Climb out of the grave and into chaos in this co-op physics platformer set in a cursed Wild West. Blast each other across deadly parkours to survive a world where the only rule is: don't fall.

Everything is destructible. Blast through walls, bring down structures, and dominate the arena with funny weapons in this turn based adventure. It’s your world to destroy and your victory to take.

Space Out Together is a co-op space survival/adventure game where your crew crash-lands in the wrong sector of space. Refuel your ship, keep each other alive, and make it to the portal before everything falls apart. Together..

Dig, build rails, and survive underground as a Goblin miner for WHAAG MINING INC. Light your path or the darkness will drain your life. Explore fully destructible biomes, fight hostile creatures, and hunt the legendary Giant Crystal, solo or online co-op

Haul your wagon as a crew to progress along the trail and escape the approaching storm! Manage your supplies and band together as you fumble through the wilderness’s challenges.

In this physics-based co-op platformer, you and a friend must carry your short-tempered king through deadly medieval courses. Dodge traps, maintain balance, and work together to reach the throne room. One wrong step, and the king might crown you with his rage!

A chaotic co-op survival game for 1–4 players where you travel the trail, manage supplies, survive disasters, and argue with friends. Work together to keep the wagon moving, adapt to random events, and try to make it to the end in one piece.

Dive into a chaotic, free-to-play party royale set in a hilarious dystopian future! Compete in absurd minigames, explore a vibrant sci-fi world, and outsmart your friends in this ever-evolving social adventure.

A chaotic online co-op survival-crafting adventure where three little pigs build a rolling wagon-home, survive the wolf each night, and travel through a fairytale world.

Harness the Sixth Force: a living bond that keeps you close and powers your energy whips. Levitate, swing, freeze obstacles, fight ridiculous enemies, and solve puzzles on the run through sweet chaos in a comedy co-op adventure for two where something stranger waits just beneath the sugar coating.

Sneak into an all-girls campus. Talk to girls, complete missions, and don't get caught by the principal. Asymmetrical anime chaos for up to 5 players.

Escape a vertical nightmare with up to 4 friends using physics-based parkour. Equip Magic Rings to customize your climb. Don't let go, just keep your Hands Up.

Manage an old, rundown nuclear power plant with up to 6 friends in online co-op. Fix hazards before you put the reactor in critical condition, manage the chaos to avoid a meltdown, and try not to get in the way of your coworkers.

What'Sub is a 4-player co-op submarine extraction game where you pilot a rust-bucket submarine into the depths of the Bermuda Triangle to recover treasure from the ocean’s seafloor. Gear up, descent, risk everything to bring your haul back to the surface, then dive again to ever deeper levels.

Climb toward the summit in a 3D parkour action game built around jumping, sprinting, and ledge grabs. As you gain height, a monochrome world blooms back into color while rain, sandstorms, and falling hazards force quick route decisions. Play solo or online with up to 8 players.

Ruffed Up is a chaotic co-op physics game where you play as dogs dragging your unconscious dog walker back home. Team up with 2–4 players online or locally to keep your human safe, cross treacherous terrain, dodge hazards, and somehow get everyone home in one piece. It’s no walk in the park!

Goal Gang is online multiplayer football built for pure chaos. Take control of a single player and jump into intense action where teamwork wins games until everything breaks loose.

Pilgor's baaack! Gather your herd and venture forth into Goat Simulator 3; an all-new (at least on Steam), totally realistic, sandbox farmyard experience. Invite up to three friends in local or online co-op, create carnage as a team, or compete in mini-games and then not be friends anymore.

A frantic co-op puzzle game where a Pilot and an Air Traffic Controller must communicate, decrypt, and improvise to save a failing aircraft. Talk fast, solve faster, and try not to crash.

🐸Up to 8 player co-op extraction puzzle-platformer where you swing, jump, catapult your friends, and eat eat EAT until you grow into a humongous Megafrog. Squad up with your frog friends and storm the sewers for the glory of the Swamp King!🐸

Plank is a frantic co-op builder where you and your friends race across a collapsing canyon. Place planks, grab upgrades, fight off enemies, and outrun a giant wall of death. Build fast, move smart, and try not to fall before reaching the end!

Explore ancient tombs and ruins in this 4-player, turn-based party game! Master cartography as you map uncharted paths, uncover secrets, and ruminate over your next move. Work together or sabotage one another with a variety of items, and discover hidden treasures and the mysteries of your expedition