109 Aliens Action games your group can play together online, including Mist Slayer, KallaX, and EXOME.
All games: 24
Mist Slayer is an action Roguelite game. You are a time traveling hero, called to aid in a mystical war, and armed with unique weapons and skills. Face down amazing enemies in parallel universes, collecting various power-ups, and exploring as you go. Play alone or team up with friends.
Kallax is a chaotic furniture-building 2 to 6 players co-op game in which only one player can read the instruction manual at a time. Experience what should have been a one person's job and lose friendships forever.
EXOME is a co-op sci-fi survival shooter that blends wave-based survival with open-world exploration. Battle hordes of aliens, upgrade your arsenal, and uncover the hidden truths of the deep forest. Will you face it alone or bring your friends along?
Spacelines from the Far Out: Flight School is all about getting you prepared to take on the task of running your own Spaceline before launch! Join up to 3 other people to take on the challenges and demands as you ferry people to their destination.
Spellwake is an online 3D Action RPG where Anything Goes. It features fast-paced hack n' slash against hordes of monsters and powerful bosses. Spellwake's vast class system allows you to make nearly infinite variations of builds.
Abduction Bit is a NES-like arcade based on elements of some timeless classics from 80's (Bubble Bobble, Ice Climber, Mario Bros).
In this 2-player twin-stick shooter, use a friendly drone for a game-changing abilities. Survive waves, upgrade, and uncover the mystery in this cooperative, action-packed experience.
Serious Sam VR: The Second Encounter is a sequel to Serious Sam VR: The First Encounter - frantic arcade action FPS, featuring singleplay and co-op campaign, various multiplayer modes, all presented in glorious VR and with different locomotion movements.
SQUIDS FROM SPACE is an 8v8, team-based PvP top-down shooter where humans and the sinister Squid aliens wage war for the future of the Earth!
Defend the Oval Office from an endless alien invasion by harnessing the abilities of your favorite (or least favorite) U.S. Presidents.
Arcade Mayhem Juanito is a retro experience about arcade-hopping. Teleport into different video games, play with unique mechanics inspired by well-known arcade games, face stunningly animated bosses and join the fight against the clonocell invasion.
UFOs! Aliens! Aircrafts! Resistance! SHOOT 'EM UP! Squad 51 vs. the Flying Saucers is a spaceship shooter with 2D gameplay and 3D environment. Enjoy a smart combination of a fast-paced shooting experience and the 1950's sci-fi movies aesthetic, with live-action cutscenes.
Xeno Crisis is an arena shooter in which up to two players take control of battle-hardened marines embarking on a deadly mission to confront an alien menace! Run and gun your way through thousands of adversaries, searching for survivors, and ultimately facing the origin of the outpost's demise.
Alien Arena is a furious frag fest with arenas ranging from the small, to the massive. With game modes such as Capture The Flag and Tactical, there are terrific team-based experiences to be had as well as 1v1 duels, free-for-all, and dozens of mutators to alter the game play to your liking.
HIVE JUMP is a sci-fi action platformer for 1-4 players blending run ‘n gun gameplay with roguelike elements.
Stranded on an alien planet, you must defend your Powercore! Use your weapons to fight hordes of alien enemies and strategically use traps in this new FPS tower-defense survival game!
It came from space and ate our brains is a unique Arcade top-down shooter. Looking for addicting gameplay, four-player co-op mode, and tons of aliens to send into oblivion? You’ve come to the right place!
Explore a vast universe with pulse-pounding action, side-splitting humor, and hair-raising plot twists in these 2 classic space adventure games.
You will see the creation of new lives... Capture enemies and fire them back at their allies as enormous beams of energy in this horizontally scrolling shooting game, featuring 5 versions of G-Darius with new features, enhancements, and Steam exclusive extras!
Gear up for an intergalactic thrill ride! Space Elite Force is a frenzied space-shooter packed with weapon customization and epic boss battles. Take command of your ship and fight for the survival of humanity!
BLAST YOUR WAY through the UK's forgotten favourite space adventure: Space Quest 2099!Enjoy combat and movement based on the designs of the Quake 3 engine. Go alone or team up and shoot baddies in cooperative episodes with FULL MOTION VIDEO with SPECIAL EFFECTS!
Cultivate a thriving farm to survive in this peaceful horror farming game! Play online with up to 16 players in the same lobby. Work together with your fellow farmers to repair your tractor and escape the farm, try not to fall victim to the eerie and mysterious creatures that lurk nearby.
Astrumis - Survive Together is an exclusively co-op horror game. One player controls a survivor on an abandoned spaceship and the other the ship itself. They must work together to survive against the mysterious monster.
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.