522 Sci-fi Action games your group can play together online, including Captain Forever Trilogy, Nelo, and UFO: Unidentified Falling Objects.
All games: 24
Millions of players worldwide have flown, built, and fought their way through Captain Forever. CF Trilogy brings Captains Forever, Successor, and Impostor to Steam with a beautiful new renderer, new modules, and a reimagined world written by acclaimed novelist Cassandra Khaw.
Nelo is the lightning fast, out of this world, genre-blending, bullet-hell, character-action epic meticulously crafted by the loving couple at Magic & Mirrors.
Unidentified Falling Objects is a unique mashup of platforming and puzzle destroying gameplay. Players are dropped into the puzzle where they must dodge the falling obstacles and destroy blocks to make big combos.
Welcome to the world of Freight Hopper. A high-octane first-person parkour experience. Test your spontaneous planning and reach the goal as fast as possible!
An online 4 player Battle Royale FPS, where each player has an AI teammate.
Scuffy Game is a First-Person Multiplayer party game that let's you play various minigames to play with friends (or by yourself. Your choice).
A one-click parkour game in space. Zoom through intricate levels using your suit's thrusters and grapple hook, all while evading colossal alien worms and racing against the clock.
Dive into the Ocean Keeper – a cooperative roguelike where four survival miners defend their Mech Spider, fight with endless hordes of monsters, and dig for resources. Team up with your friends, upgrade between waves, and survive the deep caves, full of treasures… if you can.
The fastest AG VR racer! Climb into the cockpit of a futuristic race craft and tear up the anti-gravity track. Offering single & multi-player action, Radial-G delivers full immersion combat racing on tubular tracks featuring gut-wrenching twists, jumps, splits & unique inverted racing.
Imagine if the original Zelda game was set in a science-fiction galaxy. Explore this open-world, action RPG with roguelike and metroidvania elements. Mighty bosses lurk deep within procedurally-generated dungeons. Wield, vanquish, unearth, collect, craft, progress, trip, adventure.
Code ZIN: Esper Arena is a Free To Play anime-style third-person arena shooter. Test both your reflexes and strategy in adrenaline-inducing combat. Succeed and become immortalized or fail and be forgotten. This is your chance for glory.
Gimbal is the multiplayer shooter with buildable vehicles. Customize your weaponry, engines, and accessories, and then take to the skies against other pilots in real time.
Command antique WWI Toy Soldiers in the trench-filled battlefields of Europe. Deploy an exciting arsenal of guns, artillery, flamethrowers, tanks and planes to defend your WWI toy dioramas. Take direct control of individual units or command the entire battlefield from above.
The cataclysmic battle between giant monsters has begun in this manga-inspired, side-scrolling, kaiju beat-'em-up!
Shizuku and Akane...two pilots bound by rivalry and friendship battle to save their world from malevolent cosmic forces! A classic arcade style shmup with deeply satisfying fast paced combat, wide variety of load-out combos, and even local co-op!
A free-to-play co-op sci-fi looter shooter where every mission changes the universe for everyone. Squad up with up to 4 friends, on the ground or in space, in real time or turn based, and push back the Void together.
You play the psychotic A.I. of a warship lost in space which tries to come back to Earth. Build your spaceship from scratch. Load it with weapons. And use your creation to destroy waves of innocent aliens throughout numerous levels. Loot their carcasses, extend your ship and jump to the next sector for more action!
Why play shoot 'em ups one ship at a time? Launch them all at once! Unleash an entire armada of ships in Shoot 1UP!
LAZ3RZ is a fast paced, free to play arena shooter. Master the art of wall running and ricocheting lazerz to obliterate your enemies with style!
Play as Cobra, the space pirate, in an action platformer. Along with Lady Armaroid, your loyal partner, and equipped with your iconic Psychogun, you must solve a mystery that could threaten the entire universe.
A survivors-like about a time-travelling company where you recruit your employees against endless hordes of enemies.
Space shooters never die. 1993 is a testament to that. 1993 is a classic shoot em up celebrating games like Gradius, R-Type and Life Force.
Drone Wars is a simple but unique multiplayer Sci-Fi first-person shooter, where you can play as a heavily armed combat drone or as a human special task force soldier.
A fast paced silly cutegore FPS! Earth has been taken over by demons. A catgirl codenamed MeowMeow fights back! MEOW, GUN, CLAW and BLOW UP hordes of evil demons, zombies, and other monsters in colorful environments with tons of weapons! The game runs on the FTEQW engine.