Casual · Sci-fi · Singleplayer games to play together

36 Casual · Sci-fi · Singleplayer games your group can play together online, including VHOLUME, Rhythm Doctor, and ATMOSFAR.

All games: 24

VHOLUME

VHOLUME is a melancholic first-person parkour adventure set in a dystopian brutalist city where bureaucracy turns a simple task into an odyssey.

97%97% positive of 3,875 reviews184Playing now: 184$8

Rhythm Doctor

Save patients with your rhythm mastery! Rhythm Doctor is a rhythm game where you heal patients by defibrillating in time to their heartbeats. Learn each patient's unique heartbeat and defeat boss viruses trying to sabotage your rhythm, all set to heart-pumping, soul-soothing music.

98%98% positive of 25,201 reviews70Playing now: 70$19.99

ATMOSFAR

Uncover the fate of humanity's final outpost as you survive and explore a thrilling world of floating islands. Brave the skies on your own or assemble a squadron of friends, and scavenge scrap to engineer and upgrade flying vessels, bringing your airship along for the journey.

65%65% positive of 196 reviews1.3KPlaying now: 1,348$22.49

Roadside Research

Roadside Research is a 1 to 4 player co-op gas station simulator. Except you’re aliens. And undercover. Do very human things like restocking shelves while preparing for the invasion. Just don’t get caught.

85%85% positive of 4,101 reviews87Playing now: 87$14.99

KILL IT WITH FIRE! 2

KILL IT WITH FIRE! 2 is the ultimate co-op spider-hunting experience! Either solo or as a team of Exterminators, unleash an arsenal of crazy weapons, wreak havoc, and complete dozens of challenges across seven dimensions under spider siege.

92%92% positive of 1,455 reviews16Playing now: 16$14.99

Darkwater

Darkwater is a cooperative extraction horror game for 1-4 players. Command a submarine trapped under the ice of an alien planet. Battle enemy vessels and deep sea abominations as you hunt for resources. Do what it takes to survive.

77%77% positive of 1,002 reviews10Playing now: 10$6.99

Feed the Reactor

An incremental unfolding game about feeding fuel into a reactor. Combine elements to produce energy, unlock exotic technologies and explore a strange galaxy.

81%81% positive of 672 reviews7Playing now: 7$6.99

Greedland

"Greedland” is a roguelike game mixed with survivor-like elements. It's reminiscent of Crimsonland and Vampire Survivors, and as the battle progresses your character will become a mobile arsenal of destruction!

83%83% positive of 2,985 reviews21Playing now: 21$12.99

Toaster Arena

Toaster Arena is a first person multiplayer arena shooter where players battle it out on different maps and game modes. Use Advanced movement to traverse obstacles and gain the advantage on the battlefield.

90%90% positive of 804 reviews8Playing now: 8Free

Cluckmech Oasis

Cluckmech Oasis, a top-down shooting Roguelike tower defense game. Play as the Warcluck and lead your team of animal heroes in a fight for survival. Collect, build and upgrade defenses, and engage in intense battle against waves of plant enemies.

86%86% positive of 3,097 reviews143Playing now: 143$9.99

Brotato

Brotato is a top-down arena shooter roguelite where you play a potato wielding up to 6 weapons at a time to fight off hordes of aliens. Choose from a variety of traits and items to create unique builds and survive until help arrives.

94%94% positive of 112,574 reviews5.5KPlaying now: 5,466$4.99

STAR WARS™: Episode I: Jedi Power Battles™

Take back the Theed Royal Palace in this fast and furious lightsaber action game. You will have the power of the Force and your trusty lightsaber to help you ward off legions of battle droids, destroyer droids, assassins, and other creatures from Star Wars: The Phantom Menace.

78%78% positive of 365 reviews1Playing now: 1$19.99

Backrooms: Escape Together

A visually lifelike co-op horror game for 1-6 people. Journey through 11 procedurally generated levels, using what's available to survive and progress deeper into the Backrooms.

87%87% positive of 43,383 reviews288Playing now: 288$6.99

Prodeus

Prodeus is a first-person shooter of old, re-imagined using modern rendering techniques and technology. Experience the quality you’d expect from a modern AAA game, designed with retro aesthetics and gameplay that invoke the tech-imposed limits of older hardware.

92%92% positive of 5,553 reviews15Playing now: 15$24.99

EZ2ON REBOOT : R

EZ2ON REBOOT : R – The latest entry in the beloved rhythm-action franchise is now released on Steam! Revisit the huge collection of classics with remastered audiovisual. Catch up with the freshest new songs and experiences.

91%91% positive of 6,013 reviews29Playing now: 29$22.49

Keplerth

Welcome to Keplerth! Try to survive on a hostile alien planet in this 2D sandbox RPG, where you can choose to live alone or fight side by side with your friends in the online multiplayer mode. Survive, build, farm, fight, and explore your way to victory in this open-world adventure!

83%83% positive of 3,706 reviews9Playing now: 9$14.99

Creeper World 4

The unstoppable fluid enemy has returned and destroyed every world in its path! Defend against Creeper as it floods across the 3D terrain in this real time strategy game where the enemy is a fluid.

94%94% positive of 4,572 reviews198Playing now: 198$24.99

Spacelines from the Far Out

Run your own 60s-inspired space-age alien airlines in this randomly-generated chaotic 1-to-4-player local and online co-op game!

75%75% positive of 462 reviews1Playing now: 1$14.99

BLEACH Brave Souls

The world of mega-hit manga and anime BLEACH comes to Steam in this exciting 3D action game! Build a team using your favorite characters from the BLEACH universe!

86%86% positive of 12,867 reviews1.4KPlaying now: 1,390Free

Gaia Project

Gaia Project is the digital adaptation of the boardgame Gaia Project created by Helge Ostertag and Jens Drögemüller and published by "Feuerland Verlag". It is a 1-4 player strategy game. It plays in the same universe as Terra Mystica and continues the adventure in the far future.

80%80% positive of 352 reviews6Playing now: 6$24.99

Out of Space

Strategy co-op online multiplayer game about living on a spaceship with your roommates. You'll need to generate resources, take care of a deadly alien infestation, upgrade your appliances and build your sustainable space home. Living together is never easy, especially when you are in outer space!

79%79% positive of 2,016 reviews23Playing now: 23$3.74

Tasty Planet: Back for Seconds

Control a tiny ball of grey goo with the ability to eat anything smaller than itself. The more it eats, the bigger it gets! Eat rats, dinosaurs, gladiators, samurai, pyramids, volcanoes... Everything! Soon you'll be eating the entire planet.

93%93% positive of 630 reviews2Playing now: 2$7.99

FortressCraft Evolved!

FortressCraft Evolved is a unique blend of Voxel Landscapes, Tower Defense, Crafting, Logistics, Exploration, Combat and Assembly lines. Players begin by crash-landing on a strange alien world, left with only a small handful of starting machines.

71%71% positive of 2,653 reviews17Playing now: 17$12.99

Infinity Wars: Animated Trading Card Game

Outplay your opponent with simultaneous turns and commander-driven deck-building in a fully free-to-play PvP experience. Build your deck from 1000+ cards across 8 unique factions, and face opponents on a truly level playing field. In Infinity Wars, skill is the only factor that determines victory!

77%77% positive of 3,470 reviews4Playing now: 4Free

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