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S.E.M.I. – Side Effects May Include...
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The top results based on the latest update are Legless [Score: 1.1], Chaos Budz [Score: 1.0] and Shoot Your Pal [Score: 1.0] The top rated games you can find here are RV There Yet? [SteamPeek Rating: 9.2] ranked #12, Psychonauts [SteamPeek Rating: 8.7] ranked #23 and Log Riders [SteamPeek Rating: 4.5] ranked #8 Also don't forget to check the newest releasesDon't Push Your Luck [Release date: 2026-04-29] ranked #17, Climber Toys: Together [Release date: 2026-04-24] ranked #14 and Werehouse [Release date: 2026-03-27] ranked #18 While it is tempting to play with the newest and the best, there might be some other gems in the results, like RV There Yet? [SteamPeek Rating: 9.2] ranked #12, Psychonauts [SteamPeek Rating: 8.7] ranked #23 and.
S.E.M.I. is a single-player and co-op action platformer with puzzle elements. Play as patients of an unusual clinic, take experimental drugs, interfere with each other, and be ready for chaos and unpredictable side effects!
A co-op game where you have no legs. Search different maps and clear trials to appease Gods and earn your freedom - all while a giant, quirky pair of legs hunts you down.
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Chained Together Crossing is a Co-op game where you and up to 4 friends are handcuffed and have to get to the other side of the street. Levels get progressively more difficult, and sanity will be lost.
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.
Carry cargo together on a shared board with your jelly bear teammates! Each movement affects the board’s balance, and a single mistake can bring everything crashing down.
Join a fun adventure by rolling a log together! In this 2 player co-op platformer, become lumberjacks with your friend and keep your balance while moving forward on a log. Overcome obstacles by moving back and forth, reach the goal, and never give up. Knowing how to get back up matters.
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JUPITER is a co op space survival game where even the smallest mistake can lead to disaster. Play solo or with a team as a lost alien stranded on a mysterious planet. Your only way to escape is to find the signal hidden somewhere on the planet. Will you survive long enough to get off this world?
Climb, jump, and try not to fall in this chaotic 8-player co-op parkour adventure set in a toy-filled room. Dodge obstacles, use your abilities, and stay on track — because one mistake can send you all the way back down. Try not to lose everything… or each other.
BREAKING NEWS! A giant asteroid is about to destroy the Earth! The Moon is your last hope. Work together with friends to build a fragile tower from everyday objects.
Grab your gear and your friends for a hilarious, golden-age co-op adventure! Dive into cursed temples, hunt for the ultimate treasure, and work together to stay alive. Beware of everything and everyone... after all, only the survivors get to split the gold!
A hardcore third-person platformer that blends precision climbing with ruthless RNG, where every attempt tests both your skill and your luck as one bad outcome can send you back to the bottom.
Werehouse is a co-op haunted night shift where you and up to 3 other overworked elves package presents for Santa. If stocking the sleigh trucks an hour before Christmas wasn’t stressful enough, you’ll be fighting for your life against holiday monsters while you’re at it.
An online co-op game where your livelihood depends on how well your moving company can move valuable furniture. Team up to carry the sofa up the stairs and keep your financials only mildly tragic. Coordinate, communicate and cause chaos!
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?
Climb 2500 meters of danger, sound-cued falling platforms, and no mercy on Hard mode. Play solo or in 1–6 player multiplayer – can you reach the airship at the top?
A Psychic Odyssey Through the Minds of Misfits, Monsters, and Madmen. This classic action/adventure platformer from acclaimed developers Double Fine Productions follows the story of a young psychic named Razputin.
JUST A GUY is an online multiplayer ragdoll game. Play with physics, explore small open worlds, drive vehicles, use fun items and complete objectives to earn new cosmetic outfits!
A chaotic snack-stealing raccoon party game. Compete in wild minigames, explore interactive levels, and build your treehouse base solo or with up to 3 friends online.
What if every door opened into a world that shouldn’t exist? Project: Doors throws your squad into a shifting maze packed with traps, anomalies, and creatures you’d rather not meet. Stick together, solve strange puzzles - and try to escape in one piece.
An online co-op adventure game about aliens making off with gadgets created using extraterrestrial technology. The anti-alien alarm can't stop all of us! Use physics-based objects to create havoc and extract with these powerful gadgets.
You and your friends are in trouble. Big trouble. You’ve accidentally killed someone, and now you have to get rid of the evidence. "We Are So Cooked" is a 1-4 player co-op physics-stealth game where the objective is simple: Get the body to the exit. The execution? That’s the hard part.
Multiplayer in Minesweeper? Yes! Play with your friends or random party in classic Minesweeper or try crazy challenging modes! Fun and hard simultaneously!
Hijinks High is an online co-op game that turns an average school day on its head. Group up with up to five other players to cause as much ruckus as possible! A vast arsenal of booby traps, hoodwinks, and even bodily fluids will help you accomplish your goals and be the school’s menace!
YO UP! is a chaotic co-op physics building game where one wrong move can collapse everything. Build unstable towers solo or with friends, climb floating islands, and reach for space... if your tower holds.
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!
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🐸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!🐸
Eternal Vortex Is A Online Multiplayer Shooter Where The Players Start Off With Basic Weapons, But To Become More Powerful You Have To Run Around The Map And Find A Better Weapon.
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