Top similar games like Unknown Signal: Invasion:
Unknown Signal: Invasion $39.99
Unknown Signal: Invasion is a continuation of the exciting sci-fi game. This time you have to go to an unknown planet to investigate a new mysterious signal coming from an unknown source.
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The Unknown$2.99
Aboard a small spaceship, you embark on an exploration, daring to face the threats of the universe. Activate your spaceship and uncover the hidden secrets of this vast cosmos.

Unknown Signal$39.99
Unknown Signal is a 3D adventure game. You have received a mysterious signal and you have to find out what or who sent it.

Scavenger SV-4$14.99
Scavenger SV-4 is a highly replayable atmospheric first-person science fiction game. Part simulator, part roguelike, it has elements of action, combat, resource management, and a dash of horror. It is not quite like any game you have played before.

Hellfire Rampage VR$9.99
HELLFIRE RAMPAGE is a thrilling VR combat game. You as the inventor of teleportation, hunt for crystal essences to unlock a portal to dangerous dungeons. Battle hellish creatures using a wide arsenal of interdimensional weapons. Unique combat mechanics and challenges are awaiting!

Kronostasis$9.99
A fast-paced FPS following a sci-fi story taking inspiration from Greek mythology and blending it with fantasy elements. As a security robot aboard a deep space mining vessel, you must face an unknown threat when crewmembers start turning into creatures of ancient myth.

The Indie Game Legend 3D$9.99
Blast vicious aliens, explore their mysterious labyrinth, and rescue indie game makers in this lighthearted NES inspired first-person action adventure!

ReSetna$19.99
ReSetna is an action-adventure with fast-paced combat and intense battles set in a fractured, post-apocalyptic world. Fight through hordes of corrupted machines, upgrade your abilities, traverse treacherous environments and explore to uncover the truth of what happened.

[Chilla's Art] The Convenience Store | 夜勤事件$2.99
The Convenience Store | 夜勤事件 is a J-horror game about a college girl on a night shift.

Intergalactic Rescue$2.99
In this 2D platformer intergalactic rescuer should as fast as possible to pass through space ship of interplanetary scientists and collect ion-quantum batteries. Use a variety of game mechanics to complete the levels faster. This will be challenging.

Lost in Space$3.99
Lost in Space is an open space survival adventure game. You have received a distress signal from a spacecraft.

[Chilla's Art] Inunaki Tunnel | 犬鳴トンネル$2.99
Inunaki tunnel (or Inunaki village) is a famous Japanese horror spot where people have been killed or burnt to death.

T.A.R.S$1.99
It is the year 2051, a disease has swept across the planet infecting over 90% of the population. You will take on the role of Samantha in this 3rd person horror shooter. Can you survive?

Lovanium - The Rising Suns$7.99
Find a way to escape Lovanium before it's too late. Extract resources, trade them, confront the wildest and most dangerous enemies, and fully harness the power of the suns. Are you up for it?

K37-D$1.99
In the year 2204 an average engineer gets an ordinary job offer that ends up being a lot more than he bargained for...

after the meteor shower$0.99
A platform game that starts with a space trip... simple mechanics, many different enemies, with 40 stages and sub-phases - 68 passages approximately

There The Light$4.99
Explore an unknown and abandoned world. Each step, each puzzle, brings you closer to discovering the history and secrets of a lost civilization. Can you find the light?

Potentia$19.99
Third person shooter action adventure game with post-apocalyptic theme. Witness the adventures of Victor and his friends in this abandoned world.

FURTIVE$4.99
Prisoners of war, your team was captured but on the run on a large military controlled island. Explore, gather resources, build a shelter and survive the dangerous military presence on the look out for your team in this epic first person, multiplayer, open world, survival adventure.

Biolum$7.99
Biolum is a 30min VR sci-fi narrative experience. Dive to uncharted depths of the ocean and discover a beautiful world of bioluminescent creatures. But all is not what it seems. What lies beneath the surface?

Back to the Rooms$6.99
Back to the Rooms is a 6-player co-op horror experience. Survive and explore the backrooms with your friends or alone to save your home.

INDUSTRIA$19.99
Embark on a gripping journey in INDUSTRIA, an atmospheric FPS set in Cold War-era East Berlin. Unravel the secrets of a mysterious parallel dimension while searching for a missing colleague. Explore a haunting reality where the truth awaits. Discover the dark past that lies beyond.

Starcom: Unknown Space$24.99
Starcom: Unknown Space is an action RPG of space exploration and adventure. Build your own starship while discovering an epic story in a universe of strange mysteries, alien factions and uncharted worlds.

Scenner$9.99
Scenner is a single-player sci-fi and survival horror game. One of the main elements of the gameplay is utter darkness where a sonar is your only friend. A tense adventure is waiting for you.

Explorer: Adventure Awaits$7.99
Explore new places and uncover mysteries along the way. Travel through forgotten castles and wild forests, but be ready to confront challenges at every step, from cunning traps to formidable foes. The adventure awaits - will you dare to embark?

[Chilla's Art] Okaeri | おかえり$2.99
Okaeri is a VHS Japanese psychological horror game about a middle school girl and her mother who recently moved to a new house.

Spacebug$3.99
Embark on an interplanetary journey in this space shooter game with many levels to pass or a Sandbox mode to break your record each time you play!

Lodventure$14.99
Embark on a 1-4 players Co-op survival adventure in an open world wilderness in search of a myth called the Lod Stone. Build your house, sow your crops, brew potions, tame a horse and discover powerful abilities. Venture into dangerous dungeons, fight unique bosses to find the Lod stone.

DzombZ$12.99
Survive or die ! Experience survival horror full of puzzles while escaping between the streets of Algeria after zombies invasion . Suffer to protect your life in situations never attempt them before with first person perspective and powerful actions that make it more realistic then ever

DeathOmen$6.99
DeathOmen is a short psychological horror game that challenges players to maintain their sanity over the nights in a mysterious house that hides mystery and fear. It’s a journey of constant change, full of disturbing events and jump scares.

Valince Genesis: VR$7.99
Immerse yourself in 'Valince Genesis: VR' as Detective Sinclair. A routine investigation leads you to the opulent Crimson View Hotel. Uncover the truth behind a mysterious disappearance in a storyline full of twists. Explore, decide, and survive using guns and tools. Can you escape?

Interregnum Chronicles: Signal$9.99
Mysterious signal with an unknown purpose reaches Earth. Inside a space station, a lone Operator and the onboard AI are tasked with analyzing the signal, but the process itself seems to have an unexpected effect on them. This is an INCREMENTAL game with a heavy emphasis on story.

Underwater$9.99
Dive into a world of despair in the world of Underwater. Take the role of an unknown inmate entering the a deep sea prison where mutants roam and barely any traces of human life remain. You will have to use all your ingenuity to escape and avoid becoming the meal of the hideous denizens.

Chupacabra Hunt$3.99
Chupacabra Hunt is a Chupacabra hunting horror game, a vampiric creature that is feeding on the blood of animals in the region. Track the creature by following its footprints and listening to its screams, prepare your weapon and kill it.

Myha: Return to the Lost Island$14.99
MYHA is a First Person Adventure game (Myst-like), part of a sci-fi series named The Black Cube (ASA: A Space Adventure...). Visit Myha, a moon in a far away solar system, and try to understand why you were teleported there.

Wandering in Space VR$14.99
Join Wandering In Space, a unique FPS ROGUELITE SCI-FI experience built for VR. With a variety of space weapons, upgradable armory, power ups and unknown superpower, you, a soldier without any memory have to fight the mutants, cyborgs and the rebels to survive in the space of unknown...

Chasing the Unseen$19.99
Embark on a challenging journey as you climb colossal creatures, explore otherworldly landscapes, and find what you've been seeking.

Voices in the Dark$7.99
The story of a young anthropologist who sets out on an expedition to investigate the disappearance of a group of scientists at an ancient excavation site. Creepy atmosphere and a constant sense of persecution will not let him go the rest of the way.

Lone Land$3.99
Don't be afraid of heights to find the way out. Lone Land it's about reflection, calm, and relaxation.

Natural Selection 2$4.99
A fast paced multiplayer shooter that pits aliens against humans in a strategic and action-packed struggle for survival!

Clan O'Conall and the Crown of the Stag$7.99
Master the powers of three Celtic Heroes in this hand-drawn action platformer! Solve challenging puzzles, slay unworldly demons, and cross beautiful landscapes by swapping instantly between characters. With an all-original Celtic soundtrack. You've never heard of it, so it must be mythical!

Nuclear Blaze$9.99
A unique 2D firefighting platformer from the creator of Dead Cells, featuring devastating backdrafts, exploding walls, and expected cat rescues. Battle your way through a mysterious government facility, striving to keep the blaze under control.

Tales of Terror$4.99
Tales of Terror invites you to delve into a chilling co-op horror survival experience. Unite to face unique enemies, navigate through visually stunning and treacherous levels and navigate the unknown. —Your ultimate challenge awaits: escape, if you can!

SkyIslandFREE
"SkyIsland" is made by a group of students in a college, quarter-view action-adventure game. Enjoy the wonderful world and beautiful environments as you help the protagonist, Pino, fix his broken plane and defeat monsters to return home safely.

Shrimpwrecked$2.99
Riding an extra-terrestrial weapon disguised as a guitar, battle to the bottom of the ocean deep to turn the tides of impending worldly destruction; krill or be killed!

Interstellar Marines$9.99
UPDATE 28 AVAILABLE - Interstellar Marines is an immersive tactical sci-fi First Person Simulator in the making, offering a unique blend of tactical gameplay, dynamic environments and non-scripted AI. Play Singleplayer or Co-op/PvP on servers around the world.

Rake$4.99
Do ghosts exist? What about Bigfoot, Chupacabras,Rake or Skinwalkers? And how will we ever know? You play as Gordon Davis, a scientist,a traveller and an explorer of unknown creatures and unusual events.

Scanner Sombre$5.99
Scanner Sombre is a 3d horror cave exploration game where darkness is your greatest foe. Illuminate the unseen with your LIDAR scanner, revealing the eerie beauty and peril of the abyss. From the creators of Prison Architect, this immersive adventure uses light and shadow for a haunting experience.

Antihorror$0.99
Strange coincidence brought traveler in unfamiliar places. It would be fine, except sinister desolation is starting to embrace the surroundings. There is no another soul around for the tens of kilometers. Or that’s what it seems like? I should probably go deal with that.

Husk$19.99
Husk is a purebred FPP horror inspired by the most classical representatives of the genre. Discover Shivercliff - a daunting town where you uncover the ominous and tantalizing plot. Face the worst nightmares, solve mysteries and survive the devouring darkness in order to find your family.

Game Breaker$8.99
You are inside the event horizon where everything is possible unless get out of it. Legends say you have to Break the Game to manifest what is beyond the event horizon. What is beyond the event horizon is unknown. Use and improve variant types of pulse backwards jumps to try to Break the Game.

Alchera$29.99
Alchera A Struggle for Life steward in an alternate universe, sees a portal at the end of the cave during an operation, wondering and approaching the steward. He enters the portal and finds himself in an age where god and his soldiers rule the earth, his goal is to find the portal and save himself.