Games Like S.E.M.I. – Side Effects May Include...

S.E.M.I. – Side Effects May Include...

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!

★ PEAK ★ RV THERE YET? ★ GOBLIN COMPANY ★ DUMB WAYS TO BUILD ★ MAYHEMERS ★ GAMBLE WITH YOUR FRIENDS ★ CLIMB ★ REVENGE OF THE SAVAGE PLANET ★ FISH STICK PROTOCOL ★ SUPERFIGHTERS DELUXE ★ SHADY JOB ★ SOUL CHAINED ★ WE ♥ IT 
1

PEAK

94% 👍 OF 378K
About This Game

PEAK is a co-op climbing game where the slightest mistake can spell your doom. Either solo or as a group of lost nature scouts, your only hope of rescue from a mysterious island is to scale the mountain at its center. Do you have what it takes to reach the PEAK?

Player reviews say you can…

  • …shoot a teammate with a blow dart, stick them to a cactus, and then eat them.
  • …die and keep playing as a ghost, floating alongside your team and guiding them upward even though you can't touch anything.
  • …play in a modded lobby with up to 20 climbers, coordinating rescues and supplies while the whole group screams in voice chat.
2

RV There Yet?

90% 👍 OF 88K
About This Game

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

Player reviews say you can…

  • …drink beer to get strong enough to punch vehicles back onto the road.
  • …chain-smoke cigarettes as a speed boost while you drive up deadly hills.
  • …reverse an RV into a bear, hit a ramp at 120, and get scored for the landing.
3

Goblin Company

81% 👍 OF 346
About This Game

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

4

Dumb Ways to Build

88% 👍 OF 376
About This Game

Dumb Ways to Build is a chaotic, physics-based co-op game. Team up with friends to assemble your crew and take-on dangerous construction jobs. With all the gear and no idea, work together to build your path forward, or die trying!

5

Mayhemers

85% 👍 OF 163
About This Game

"Mayhemers" is a multiplayer chaos creation game for up to 8 players with a procedurally generated map. Choose your side: Will you be a Mayhemer or a Guardian? Mayhemers' task is to create chaos. Guardians' task is to stop them.

6

Gamble With Your Friends

90% 👍 OF 24K
About This Game

An online 1-6 player co-op "casino crawler" where you and your friends share one bank account and one massive debt. Gamble, buy sketchy items, make terrible decisions, and climb an ominous casino tower to hit your loan shark’s daily quota in 5 minutes - or face the consequences.

Player reviews say you can…

  • …get boxed into just a head and have your friends dribble you around like a ball between bets.
  • …sell an eye and end up playing half-blind after the screen gets partially blacked out.
  • …buy a bazooka, get shoved into a limo, and get driven to a casino with a quota to double your cash to leave.
8

Revenge of the Savage Planet

86% 👍 OF 3.6K
About This Game

Revenge of the Savage Planet is an upbeat, satirical action adventure Sci-Fi. Jump, shoot and collect your way across vibrant alien worlds, uncovering new gear and upgrades, while discovering various hidden secrets.

Player reviews say you can…

  • …Scan Alien Life
  • …Capture Strange Creatures
  • …Grapple Across Planets
9

Fish Stick Protocol

80% 👍 OF 166
About This Game

Enter strange, unpredictable dimensions with up to 8 players to grab artifacts and survive the chaos waiting inside. Showcase your loot in your private museum, unlock new machines, and gear up for your next dive. And please, shower between missions. Management insists.

10

Superfighters Deluxe

89% 👍 OF 3.6K
About This Game

Superfighters Deluxe is a unique action game that combines brawling, shooting and platforming in dynamic sandboxy 2D levels. Lots of weapons and fun gameplay systems interlock to create absurd action-movie chaos.

Player reviews say you can…

  • …Weaponize The Environment
  • …Throw Props At Enemies
  • …Survive Endless Waves
11

Shady job

74% 👍 OF 164
About This Game

A co-op adventure game. The mafia wants to get rid of a body. You’re construction workers. Your job: carry a body bag to the top of a skyscraper. Bury it in concrete. Two problems. First: You have to build the way up. Second: The body’s not dead. It fights back.

12

Soul Chained

71% 👍 OF 218
About This Game

Bound by the Soul Chain, fight through purgatory as chained rival warlords using chain magic, teamwork, and terrible decision-making. Trip enemies, accidentally drag your partner to their death, and survive brutal bosses armed with suspicious amounts of jiggle physics.