
Alt Oxygen is a survival game based on an economical design. Beside to survive there is a story to understand what happened and where are you exactly in the universe.
60+ similar titles based on shared tags and player behavior. Themes include Conspiracy, Adventure, First-Person, Action.

Alt Oxygen is a survival game based on an economical design. Beside to survive there is a story to understand what happened and where are you exactly in the universe.

BANE-FALL
You’re an Operator in a covert underground facility, researching advanced military and alien technology. A routine day takes a sinister turn... Fight hostile creatures, explore alien corridors, and uncover the mystery as you struggle to survive

Insane maze
Can you get out of the auto-generation insane maze alone or with friends? The maze is full of useless items for survival, what if they won't help you, but the monsters will overtake you!
You’re an Operator in a covert underground facility, researching advanced military and alien technology. A routine day takes a sinister turn... Fight hostile creatures, explore alien corridors, and uncover the mystery as you struggle to survive
Why similar: Conspiracy 30.4% ★, Aliens 28.4%, FPS 15.9%, First-Person 7%, Atmospheric 5.2%
Can you get out of the auto-generation insane maze alone or with friends? The maze is full of useless items for survival, what if they won't help you, but the monsters will overtake you!
Why similar: Conspiracy 24.1% ★, Mystery Dungeon 19.9% ★, Aliens 18.2%, Action-Adventure 7.4%, Futuristic 7%
Dreamrealm's Tower of Despair is a light horror RPG whose action happens inside a haunted tower. A story revolving around a knight of light that embarks on a dangerous quest to fight an evil vampire who deceives his followers into blasphemy and sacrifices for his own gain.
Why similar: Faith 29% ★, Conspiracy 27.3% ★, Mystery Dungeon 18.9% ★, Exploration 7.2%, Fantasy 5.8%
A first-person survival horror game where you explore a mutating house, evade a delusional family, and live through the nightmare.
Why similar: Conspiracy 29.4% ★, Aliens 25.8%, FPS 14.2%, Action-Adventure 11%, Action 7.6%
A third-person psychological thriller focused on observing, influencing, and subtly shaping the behavior of a character trapped in her own routine. In 1948, you manipulate small environmental details to shift perceptions and shape the relationship between player and protagonist.
Why similar: Psychological 37.5%, Conspiracy 28.6% ★, Interactive Fiction 17.1%, Exploration 7.4%, Atmospheric 4.9%
Sole Salvation is an action roguelite hack and slash where you can wield a ranged weapon and a melee weapon simultaneously. Recover your thoughts to combine your abilities, defeat the creatures that hunt you, and advance through the corrupted lands of your memories in search of redemption.
Why similar: Conspiracy 28.4% ★, Aliens 24.6%, Faith 23.1% ★, Action-Adventure 8.7%, Atmospheric 5.5%
A psychological horror adventure where you explore abandoned locations and unravel dark legends. Set in a remote castle hiding a black magic experiment gone wrong, you'll face haunting environments, challenging puzzles, and a fight to survive the horrors lurking within.
Why similar: Conspiracy 33.8% ★, Psychological 25%, Interactive Fiction 12.1%, Action-Adventure 7.5%, Exploration 7.1%
How do you know, if something is real, or just in your mind? Are you really sure that you can distinguish imagination from reality? For the next couple of hours, listen, watch and be part of a story where imagination and reality intersect each other.
Why similar: Conspiracy 33.4% ★, Faith 29.9% ★, Psychological 19.7%, Action-Adventure 4.6%, First-Person 3.7%
You're a renegade ex-priest who has abandoned the cassock to wield shotguns and occult rituals. Armed with corrupted faith and the occult, you face lost souls in search of redemption or revenge. A survival horror game inspired by the real-life atrocities of the Colony Hospital in Barbacena (Brazil).
Why similar: Conspiracy 25.2% ★, Psychological 24%, Faith 16% ★, Exploration 8.7%, Action-Adventure 7.5%
Assume the role of Jack Kursby, an intergalactic hired gun with his partner dog, Georgie. Together your skills will be strained against a most despicable enemy in a high octane story across the stars.
Why similar: Conspiracy 27.3% ★, Aliens 23.6%, FPS 12.7%, Action-Adventure 9.8%, Futuristic 5.9%
Your friend Mike is missing! He made pizza at the local pizza joint until his paranoia with aliens took over. Help find him in this strange, lo-fi adventure! Set in the 1990s, Aliens Rule is an indie RPG game full of conspiracy theories, mystery, NPC interaction, and lots of pizza.
Why similar: Conspiracy 41% ★, Aliens 38%, Exploration 8.7%, Interactive Fiction 8.1%, Atmospheric 2.4%
You came to hunt a vampire. Instead, you're trapped in his sprawling Gothic castle. You must hold on to your dwindling faith and dismantle his defenses before Nightrise — or become his prey in this single, story-driven experience.
Why similar: Faith 42.6% ★, Psychological 23.4%, FPS 12.6%, Exploration 10%, First-Person 4.7%
Your friend is missing in the Australian outback and you must find her. Search the Internet for clues, solve mysterious puzzles and uncover the conspiracy of the vanishing hikers of Golden Valley.
Why similar: Conspiracy 31.2% ★, Foreign 17.8% ★, Psychological 17.3%, Interactive Fiction 11.3%, Exploration 7.4%
Push the limits of what’s possible with physics in Physics World: Evolution!
Why similar: Conspiracy 30.5% ★, Aliens 25.2%, Sandbox 11.5%, FPS 10.4%, Exploration 7.8%
A first-person survival horror game where you explore an abandoned high school, solve puzzles, manage your battery, and outsmart relentless dark figures to survive the night.
Why similar: Faith 30.5% ★, Conspiracy 27.8% ★, Foreign 21.5% ★, Interactive Fiction 12.1%, First-Person 4.5%
Point and click about apples, featuring real photos as backgrounds, with gameplay sections inspired by billiards and a Lynchian story about a -paranormal?- event taking place in a small town, psychologically and physically transforming the neighborhood’s residents.
Why similar: Conspiracy 28.3% ★, Aliens 21.9%, Interactive Fiction 11.9%, FPS 9.4%, Action-Adventure 7.4%
Biomass: Extermination is a first-person sci-fi shooter game, set in a world destroyed by alien invasion, created entirely by solo developer using Unreal Engine.
Why similar: Conspiracy 31.3% ★, Aliens 30.7%, FPS 17.3%, First-Person 7.4%, Action 7.2%
Moonless Night is a psychological horror game where you explore Selene’s mind, uncover her sins, and escape a labyrinth of shadows. Every choice matters—face the darkness and discover one of six different endings.
Why similar: Mystery Dungeon 36.2% ★, Psychological 21.9%, Interactive Fiction 18.5%, Exploration 14.6%, Adventure 5.7%
WORK. DIE. REPEAT. Can you break out from the sinister cycle?
Why similar: Conspiracy 39.5% ★, Psychological 24.8%, Interactive Fiction 16.8%, Exploration 7.3%, Adventure 6.1%
Escape your nightmares. Explore the Backrooms and other dreams. Solve puzzles to find your way out. Don't get caught.
Why similar: Psychological 25.1%, Exploration 13.9%, Colorful 11.9%, First-Person 9.3%, Atmospheric 8.4%
Can you find all 100 Hidden Cats in America?
Why similar: Psychological 41%, Action-Adventure 18.1%, Exploration 16.3%, Adventure 13.9%, First-Person 10.7%
Somewhere in South America, aliens have made contact. Visitors have not come in peace to Planet Earth... Open world third person shooter (TPS) game. Single player video game, compatible with Windows 8 / 8.1 / 10 / 11 The game locations are inspired by real places in South America.
Why similar: Conspiracy 41.8% ★, Aliens 34%, Action-Adventure 10.5%, Exploration 8.5%, Adventure 5.1%
The colors are dispersed and disunited. Robots are scattered everywhere. There is no safe place, but it wasn't always like this. The colors were gentle and united in the past. There were no robots. Something must have happened. Can you uncover the truth of this story?
Why similar: Conspiracy 35.7% ★, FPS 14.7%, Action-Adventure 12.4%, Colorful 9.6%, Fantasy 8.1%
A psychological thriller where reality and memory collide. Unravel abandonment, depression, and shattered love through mysterious tapes. Dare to face your ghosts...
Why similar: Psychological 37.1%, Interactive Fiction 26.7%, Exploration 14.6%, Adventure 12.3%, First-Person 9.3%
Try to survive the experiments being conducted on you while you attempt to uncover the truth about why you are there.
Why similar: Conspiracy 45.7% ★, Psychological 29.6%, FPS 12.6%, Action 8%, Atmospheric 4.1%
Dark Eyed Angels is a grey alien abduction survival horror game. A darker vision of the Grey Alien phenomenon.
Why similar: Aliens 35.4%, Psychological 24.4%, Interactive Fiction 11.3%, Exploration 7.6%, Atmospheric 7.2%
A free to play multiplayer survival horror game with a unique damage system. One bullet can be game over if not treated properly, and you must be willing to lose an arm and a leg to finish your objective.
Why similar: Conspiracy 36.2% ★, Aliens 30.2%, FPS 14.9%, First-Person 6.7%, Action 6.2%
House of Horror: Outside Is Better is a first-person psychological survival horror game with FPS mechanics. Explore a facility consumed by madness, solve puzzles, manage scarce resources, and survive using your wits and a dynamo-powered flashlight, where every shadow can become a deadly threat.
Why similar: Conspiracy 30.3% ★, Psychological 20.6%, Interactive Fiction 12.1%, FPS 11.7%, Action-Adventure 6.3%
Mushy is a round based first person shooter. The attackers plant a bomb and the defenders defuse it; all while engaging in armed combat!
Why similar: Faith 39.3% ★, Colorful 12.4%, Action-Adventure 11.9%, Fantasy 11.6%, Atmospheric 7.1%
A first-person psychological horror experience focused on atmosphere, tension, and clever environmental puzzles. Explore the abandoned Morwain Mansion, solve occult mysteries, and uncover a dark truth that relentlessly hunts you in the shadows.
Why similar: Psychological 43.1%, Interactive Fiction 12.9%, FPS 12.4%, Exploration 9.5%, Atmospheric 9.2%
Within this narrative VR experience FATE OF THE MINOTAUR, players descend into the mythical labyrinth, learn about the Minotaur’s tragic story and confront him to escape.
Why similar: Mystery Dungeon 25.7% ★, Interactive Fiction 18.8%, Action-Adventure 12.2%, Exploration 10.5%, Action 9%
Within the Unknown is a first-person, psychological indie horror game where you regain your memory and relive the trauma from your dark past in a sci-fi simulation.
Why similar: Conspiracy 31.8% ★, Aliens 28.4%, Interactive Fiction 10.7%, Exploration 7.9%, Atmospheric 6.8%
Land with your friends on the surface of various planets, gather resources, create items and buildings, defeat enemies and move to other planets to discover their secrets and secrets
Why similar: Aliens 27.8%, FPS 13.7%, Action-Adventure 10.4%, Futuristic 10.2%, Exploration 10%
Something stirs in the backwoods of Montana. You can hear it trying to get in. All you have is your trusty dog and a camcorder. A short 5-10 minute game with 2 endings.
Why similar: Faith 28.2% ★, Conspiracy 26.1% ★, Aliens 22.2%, Exploration 7.9%, Atmospheric 6.6%
A lonely evening in a RV in the woods. Strange lights appear above the trees. Hide from the unknown and try to survive the night when the sky grows comes too close.
Why similar: Aliens 33.5%, Conspiracy 25.6% ★, Foreign 21.4% ★, Exploration 6%, Atmospheric 5.4%
On an isolated space station, no one is who they seem in this interactive narrative thriller.
Why similar: Psychological 25.4%, Aliens 23.1%, Interactive Fiction 18%, Action-Adventure 7.8%, First-Person 7.3%
Unknown Presence is a first-person adventure horror game where you will witness unexplainable phenomena, from floating orbs to unknown beings. You will explore many locations, from caves all the way up to snowy mountains and everything in between.
Why similar: Aliens 58.9%, Action 10.4%, Action-Adventure 10.2%, Adventure 8.6%, First-Person 6%
You are sent to a Vaccine Zombie colony because you have developed early symptoms of the illness that will soon make you a zombie. You may need to eliminate hundreds of zombies to find the antidote. If successful, your mission will be extended to destroy the aliens that started this.
Why similar: Conspiracy 34.6% ★, Aliens 33.3%, FPS 11.8%, First-Person 6.1%, Action 5.2%
Former FBI agent and fishing enthusiast, faces an alien-zombie apocalypse after a virus escapes from NASA. Determined to rescue his wife, he defies the FBI and embarks alone to confront the threat. An epic rescue mission filled with action and suspense!
Why similar: Conspiracy 43% ★, Aliens 32.9%, FPS 12.3%, Adventure 4%, Action 4%
You can’t fight what hunts you. Build makeshift hideouts to evade the cursed monsters of Radu Castle. As Dorinela, a survivor returning to face her abuser’s curse, rely on your wits, courage, and determination to stay alive.
Why similar: Mystery Dungeon 23.1% ★, Psychological 16.6%, Interactive Fiction 15.1%, Action-Adventure 9.6%, Atmospheric 9%
Unravel dark secrets, confront inner demons, and shape the haunting narrative in this psychological thriller. Your choices define the gripping, first-person journey - will you unravel the truth or succumb to madness?
Why similar: Psychological 34.4%, Conspiracy 19.3% ★, Interactive Fiction 14.4%, Action-Adventure 10.6%, Exploration 8.1%
A sci-fi co-op horror game driven by exploring procedurally generated abandoned space stations.
Why similar: Aliens 36.2%, Action-Adventure 12.7%, Exploration 11.8%, Futuristic 10.5%, Atmospheric 8.1%
Marooned on an hostile planet, a pilot tries to unravel his past before madness dwells him…or worse, before he dies to be cloned and repeat this nightmare once again.
Why similar: Aliens 34.2%, FPS 15.2%, Action-Adventure 12.2%, Exploration 11.4%, Atmospheric 7.6%
Rise children of the almighty and be guided to your salvation. You must trek a path of mud and blood, but if you walk it together, you will surely have enough strength to tear through these beasts. Grab two friends and shoot zombies in this Venice carnival inspired shooter.
Why similar: Faith 47.8% ★, FPS 18.2%, Fantasy 9.1%, Atmospheric 8.9%, First-Person 8.5%
A first‑person fantasy and sci‑fi adventure where you explore a living world, sketch strange creatures, gather rare ingredients, and unravel puzzles through a tale shaped by the quiet echoes of time.
Why similar: Conspiracy 34.7% ★, Interactive Fiction 17.2%, Action-Adventure 10.8%, Exploration 10%, Colorful 9.2%
A First Person Sci Fi Horror Game. Set within a confidential Underground Facility, Navigate through this Abandoned Complex, Discover Government Experiments, Alien Beings, and the haunting aftermath of the Roswell Crash.
Why similar: Conspiracy 39.8% ★, Aliens 34.5%, Exploration 8.2%, First-Person 5.3%, Action-Adventure 4.6%
Enter the thrilling world of Spheriums! Unravel the powers of the elders, forge power-ups, upgrade your gear and skill, and create weapon implants to save our civilization. Use your scanner to master the weapon twists or risk failure. The fight for survival begins!
Why similar: Aliens 28.9%, FPS 15.7%, Exploration 11.8%, Action-Adventure 11.3%, Colorful 10.2%
Try to survive on a deserted ship drifting in a foggy ocean. Complete daily tasks, keep your sanity, and uncover the secrets of the missing crew. But be careful-nothing is as simple as it seems. Are you ready for the challenge?
Why similar: Mystery Dungeon 26% ★, Psychological 19.3%, Interactive Fiction 16.8%, Action-Adventure 10.3%, Exploration 9.8%
BTGZ:FC is a sci-fi horror game where you control an RC drone to explore a dangerous new dimension. Navigate a vast network of tunnels and Survive hostile entities and anomalies using specialized tools and devices built specifically for the drone, and rely on transmitter antennas to travel.
Why similar: Psychological 19.4%, FPS 17.6%, Action-Adventure 14.7%, Exploration 13.5%, Action 10.9%
Remote listening station. 1984. You're the operator decoding an impossible signal using oscilloscopes, tape machines, and analog equipment. Align satellites. Analyze waveforms. Make choices that determine humanity's response. Multiple endings. DISCOVER THE TRUTH!
Why similar: Conspiracy 36.4% ★, Aliens 29.4%, Interactive Fiction 16%, Atmospheric 6.8%, First-Person 6.1%
Explore a vast space station caught in a crisis and adrift in the void. Discover new weapons, fight challenging foes, and discover the dark secrets of Project HOSTILE in this in this Sci-fi Metroidvania.
Why similar: Aliens 24.8%, FPS 12.6%, Exploration 10.5%, Action-Adventure 10.2%, Futuristic 10.2%
幻想乡又迎来了新的异变,黑暗之中的怪物爪牙悄然袭向平静生活中的人们……直到那一天,境界分割了整个幻想乡。“我要狠狠痛扁异变的始作俑者口牙!!”在放出狠话后,城管开始了她的执法之旅,并与友人在裂变的幻想乡中逐渐接近异变的真相。交流群736680505
Step into the boots of a fire lookout in this atmospheric first-person horror game. Armed with only a flashlight and a pump-action shotgun, you must survive the eerie alien threat lurking in the shadows. Uncover the dark secrets and unravel the mystery behind the strange happenings in the area.
Why similar: Aliens 40.2%, FPS 17.3%, Exploration 12.6%, Atmospheric 9.1%, First-Person 8.4%
Survive the night in an old observatory, helping your friend find the sources of mysterious radiation from outer space.
Why similar: Faith 38.8% ★, Conspiracy 35.3% ★, Exploration 7.3%, First-Person 6.1%, Atmospheric 4.3%
A sci-fi, horror, thriller, mystery and conspiracy fps.
Why similar: Conspiracy 36.5% ★, Aliens 33.4%, FPS 12%, Action-Adventure 8.1%, Action 5.2%
In this First Person Shooter, take on a dangerous mission in infiltration and battling Autonomous Drones. Will you uncover the conspiracy?
Why similar: Conspiracy 41.3% ★, FPS 17.5%, Exploration 14%, Action-Adventure 10.2%, Action 6.3%
A map. It is the only clue available to solve a mystery involving an island and its former population that can lead to your missing partner. Follow this short exploration adventure which you will have to observe your surroundings to identify your location on a map and make your way to the objective.
Why similar: Faith 33.2% ★, Conspiracy 32.2% ★, Exploration 13.2%, Adventure 11.2%, Colorful 10.3%
An intergalactic conspiracy threatens the fate of humanity! Team up with a wide cast of talking alien guns as you shoot, stab, and skate your way through the exotic locales to take down the bad guys and save your favorite species (humans)!
Why similar: Aliens 32.9%, FPS 21.5%, Action-Adventure 14.2%, Futuristic 8.3%, Action 8.2%