Halo Infinite
From one of gaming's most iconic sagas, Halo is bigger than ever. Featuring an expansive open-world campaign and a dynamic free to play multiplayer experience.
69% positive of 181,685 reviewsPlaying now: 968Free
Sci-fi Action games to play together
522 Sci-fi Action games your group can play together online, including Halo Infinite, SD GUNDAM BATTLE ALLIANCE, and UNSIGHTED.
All games: 24
SD GUNDAM BATTLE ALLIANCE
SD Gundam Battle Alliance is a multiplayer Gundam action RPG where you can smash foes solo or with friends in thrilling mechanized combat. Acquire new mobile suits, power them up, and take them into battle in various missions!
62% positive of 4,908 reviewsPlaying now: 26$59.99
UNSIGHTED
EXPLORE YOUR WAY. Awoken to a world ruined by war, Alma must traverse the vast city of Arcadia before the life force of her friends and herself withers away. Time is ticking, and every moment matters. Who will you save, and who will you leave to turn UNSIGHTED?
93% positive of 1,890 reviewsPlaying now: 5$19.99
I MAED A GAM3 W1TH Z0MB1ES 1N IT!!!1
A top down twin stick zombie slaying shooter that you are sure to play again and again!
96% positive of 1,860 reviewsPlaying now: 2Free
PULSAR: Lost Colony
The co-op open-world space sim where everyone has a role! Pilot the ship. Reroute power. Launch nukes. Explore alien planets. Research new talents. Work together to find the Lost Colony! ...or just deliver some biscuits
89% positive of 4,413 reviewsPlaying now: 24$19.99
HUNTDOWN
In the mayhem-filled streets of the future where criminal gangs rule and cops fear to tread, only the bounty hunters can free the city from the corrupt fist of felony. Lay waste to the criminal underworld and make a killing in this hard boiled action comedy arcade shooter.
93% positive of 4,109 reviewsPlaying now: 18$19.99
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% positive of 4,572 reviewsPlaying 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% positive of 462 reviewsPlaying now: 1$14.99
Darius Cozmic Collection Arcade
Darius is one of the pioneers of the side-scrolling shoot 'em genre, and the Steam version replicates the multi-screen arcade experience with 4 different titles and 7 versions filled with aquatic-lifeform-themed bosses and epic, Zuntata-composed soundscapes!
94% positive of 153 reviewsPlaying now: 1$44.99
Scrapland Remastered
The cult game that marked MercurySteam's origins returns; a sci-fi adventure with memorable characters, powerful ships and humor! Enjoy intense Multiplayer battles and races with ships you build.
91% positive of 108 reviewsPlaying now: 1$19.99
Deep Rock Galactic
Deep Rock Galactic is a 1-4 player co-op FPS featuring dwarven space miners, procedurally-generated destructible environments, and endless hordes of alien monsters. Explore cave systems, mine for minerals, and work together to survive!
96% positive of 304,197 reviewsPlaying now: 8,566$8.99
Titanfall® 2
Respawn Entertainment gives you the most advanced titan technology in its new, single player campaign & multiplayer experience. Combine & conquer with new titans & pilots, deadlier weapons, & customization and progression systems that help you and your titan flow as one unstoppable killing force.
94% positive of 257,454 reviewsPlaying now: 2,048$29.99
EARTH DEFENSE FORCE: WORLD BROTHERS
A new EDF adventure begins! Only this time, the action unfolds in a parallel world where the Earth is made of digital blocks. This world has befallen into chaos, as the once peaceful square Earth has been shattered into pieces. Shape aside, it is an Earth nonetheless which needs to be defended.
81% positive of 686 reviewsPlaying now: 10$39.99
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% positive of 12,867 reviewsPlaying now: 1,390Free
Journey To The Savage Planet
"WELCOME TO THE PIONEER PROGRAM! As the newest recruit of Kindred Aerospace - The 4th best interstellar space exploration company - Your job is to determine if the planet ARY-26 planet is fit for humans. You may be short on equipment and experience, but you'll figure it out. Good luck!
87% positive of 5,680 reviewsPlaying now: 12$29.99
Predator: Hunting Grounds
Hunt or be hunted in this asymmetrical multiplayer shooter that pits man against Predator. As part of a Fireteam, complete missions before the Predator finds you. Or be the Predator and hunt your prey.
76% positive of 4,660 reviewsPlaying now: 18$19.99
STAR WARS™ Battlefront™ II
Be the hero in the ultimate STAR WARS™ battle fantasy with STAR WARS™ Battlefront™ II: Celebration Edition!
87% positive of 88,071 reviewsPlaying now: 1,616$39.99
M.A.R.S.
MARS is a Free-To-Play Third Person Shooter set in an evolving sci-fi world. From the hilarious Headhunter mode, to Huge Mecha vs Mecha battles, to fully customizable loadouts; whether Co-op or PvP, M.A.R.S. has something for everyone. Kill, Die, Repeat.
62% positive of 1,167 reviewsPlaying now: 28Free
SMASH LEGENDS
Play Smash Legends for free! Smash Legends is an exciting PVP action brawler where fairy tale Legends engage in a lively battle. Play solo or in a 3v3 team battle with your friends! Play now with Smashers from all over the world on Steam, iOS, and Android!
68% positive of 10,135 reviewsPlaying now: 117Free
OUTRIDERS
Outriders’ brutal and bloody combat combines frenetic gunplay, violent powers and deep RPG systems to create a true genre hybrid.
65% positive of 46,185 reviewsPlaying now: 282$19.99
Apex Legends™
Apex Legends is the award-winning, free-to-play Hero Shooter from Respawn Entertainment. Master an ever-growing roster of legendary characters with powerful abilities, and experience strategic squad play and innovative gameplay in the next evolution of Hero Shooter and Battle Royale.
66% positive of 1,075,624 reviewsPlaying now: 53,818Free
DOOM Eternal
Hell’s armies have invaded Earth. Become the Slayer in an epic single-player campaign to conquer demons across dimensions and stop the final destruction of humanity. The only thing they fear... is you.
91% positive of 190,467 reviewsPlaying now: 510$29.99
Avorion
A procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.
89% positive of 13,057 reviewsPlaying now: 415$24.99