Top similar games like S.E.M.I. – Side Effects May Include...:

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.

An online co-op puzzle platformer physics game in space! You and your budz suit up and join the experimental astronaut training program. There is no catch. Just survive orbital space stations.. somehow.

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.

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.

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.

Online co-op for two players tied to the same rolling log. You steer one end, your friend steers the other, so every turn is an argument and every crash has a culprit. The road falls apart behind you. Whatever just happened, it was not your fault.

A co-op destruction game where you and your friends work on a demolition crew under the Grasso Family. Earn cash by destroying procedurally generated, physics based buildings across NJ.

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.

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

Rise, knight. Reclaim the skies you were once promised. alone or with up to four friends. Cross ever-changing floating isles, survive chaotic encounters, gather Power, and strengthen your Bonk. Conquer the Aer Isles, or knock each other back trying.

A co-op adventure about driving your Recreational Vehicle home.

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.

Play in co-op as the crew of the world’s worst airline. Your plane is falling apart, your cargo is illegal, and passenger safety barely makes the list.

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 co-op game where you and your friends embark on an epic journey to drag the goblin king’s dead body across the kingdom to resurrect him. Use brains, brawn and crazy goblin magic to navigate the tricky terrain and puzzles that lie in your path.

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.

A chaotic co-op climbing race for 2–4 players! Scramble through a floating countryside full of traps, moving platforms, and wild obstacles. A UFO stole your yellow ox — climb higher, shove your rivals, rewind and fast-forward time to carve new paths, and survive to save it.

Haul blood, corpses and live specimens back to R&D. MOPCORE is a 1-4 player co-op workplace-sitcom roguelite set inside a bio-research facility. Fight the mutant bugs your manager unleashes and mop up the mess to pass performance reviews and get upgrades. Try not to disappoint your manager!

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.

You are a salmon, performing platforming that feels as satisfying as it feels ridiculous that a salmon can do it. Jump off walls, race your salmon friends, learn the ways of the salmon. Also, did you know that salmon are magnetic?

Run, dodge, and launch your way to freedom! Evade angry farmers, collect scrap components across the farm, and construct a makeshift catapult to propel yourself over the fences before you get caught.

1-4 player co-op surgery game where you are aliens assigned to operate on a human. None of you has ever seen a human before. Extract the right organs, brew the right compounds, contain the mutations and DO NOT let the human be reborn aboard the ship.

Carry On Together is an online co-op moving game for up to 4 players, where you build a small delivery company with your friends and every job can turn into chaos. Break the furniture, crash the truck, lose all your earnings or hold it together as a team. Can you keep the company alive?

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!

An online co-op action game up to 6 players. Play as mischievous foxes to locate and steal fully physics-based loot while fighting humans and other rival foxes. Play solo, online with or against your friends!

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!

Play in co-op as a crew of aliens racing to escape an impending meteor strike. Gather resources, fabricate scrap metal, survive brutal fabrication stations and assemble your spaceship while surviving the chaos... Work together to build and launch before time runs out!

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.