AlterSpace
Explore a vast universe, uncover the mystery of humanity's demise, gather resources, build bases, and scan the unknown. Your journey awaits in this post-apocalyptic sci-fi adventure.
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The top results based on the latest update are Not Enough Space [Score: 1.1], Inner Rain [Score: 1.0] and High On Life 2 [Score: 1.0] The top rated games you can find here are RAGE [SteamPeek Rating: 6.5] ranked #35, Breathedge [SteamPeek Rating: 6.2] ranked #23 and High On Life 2 [SteamPeek Rating: 5.2] ranked #3 Also don't forget to check the newest releases Deadline Escape [Release date: 2026-03-16] ranked #33, High On Life 2 [Release date: 2026-02-13] ranked #3 and Skyformer [Release date: 2025-11-10] ranked #12 While it is tempting to play with the newest and the best, there might be some other gems in the results, like Breathedge [SteamPeek Rating: 6.2] ranked #23, Deadline Escape [SteamPeek Rating: 4.8] ranked #33 and RAGE [SteamPeek Rating: 6.5] ranked #35.
Explore a vast universe, uncover the mystery of humanity's demise, gather resources, build bases, and scan the unknown. Your journey awaits in this post-apocalyptic sci-fi adventure.
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
Survive in a ruined Biosphere on a hostile alien world. Endure, then harness the extreme weather, battle powerful bosses for upgrades, and uncover the mystery behind the planet’s lost atmosphere.
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)!
Lead a rebellion against tyranny in this open-world, survival sci-fi RPG game. Utilize alien technology to explore, build bases, craft, and farm. Prepare for an unequal combat to rescue humanity from tyranny and a mysterious deadly virus.
Mass Invasion is an open-world co-op survival horror tactical shooter where you must survive against zombie hordes and alien invaders while searching for your pregnant wife.
FPS single-player de ciencia ficción con supervivencia y exploración interdimensional, donde combatís criaturas anómalas y luchás por sobrevivir en entornos distorsionados.
A sci-fi survival game on a hostile alien world. As a lone robotic unit, manage resources, upgrade your systems, face extreme weather, and uncover the mystery of the three moons through choices that shape your fate.
Protect the lighthouse, destroy nests and complete tasks.
Cyber Courier 2088 is an cyberpunk sci-fi courier game, where you start out as a taxi driver transporting passengers and goods as you become a sought after cyber courier in a crazy low-poly Sci-Fi world.
The city is gone. Can you survive? Yuri is a soldier who is on training by C.A.P.I.T.A.L. which is an international military corporation. Can Yuri get out of the capital of Turkey alive and uninfected?
☵ HIRAETH is a sci-fi, first-person realistic survival game set on the desolate alien planet Ahra Prime, now offering an introduction to Story Mode with tasks and a multi‑stage quest. Explore on foot, by vehicle, or underwater as the planet tests you. Only the strong survive – but how long… and you?
Create an automated system that terraforms a planet with an army of drones. Craft and build bases, set up a weather monitoring system, prepare to survive different types of storms, and take control of the climate and biomes!
RAID hostile spaceships, BUILD powerful ships, and RECRUIT skilled crew members to expand your fleet! Jump into this action-packed shooter and fight to keep Project Mind from falling into the wrong hands...
Seeking vengeance against the creatures that killed his family, embark on a journey to find the source and uncover the mystery of the creatures in this open-world light RPG with horror elements. Explore, scavenge, fight, and survive through means such as parkour, puzzle solving, and skills.
Exodomia is a narrative-driven, action-adventure game set on the robotic world of Salakar V! In this fast-paced combat experience, you will encounter many dangerous creatures and enemies as you navigate a story of struggle and survival.
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A light-hearted but deep first person exploration and survival game for you and your friends set in a procedurally-generated asteroid belt on the edge of known space. Explore the world, learn new skills, build and defend your base, and conquer the belt's unique threats.
Outpost is a building and planet exploration game. An entire planet is available for you to explore.
3d space style game where you walk around a ship trying to figure out what happened as you seem to be the only survivor. In the far future as humanity fights its biggest war yet. you wake up in a broken ship floating in space with no clue what happened to the crew or the ship.
INTERASTRA is a fully immersive first-person sci-fi survival adventure game set in outer space. Discover unknown planets differing in weather conditions, resources, and various mysteries. Craft necessary equipment, launch, and control space rockets, explore the universe, and survive among the stars.
Alien zombies survival game, open world survival.Game uses unreal engine 5
Spiritus Astrum is a persistent, open-world, multi-player, roleplaying sandbox. It features an infinite, procedurally generated universe which players are free to explore without restriction. Spiritus Astrum is more than a game, it is a world.
An immersive exploration-heavy adventure full of mystery, danger, beauty, and consequence. Breach doors. Siphon fuel. Bypass security. Evade patrols. Follow the Filament until the last secret is revealed and the final question is answered.
Survive in outer space! Together with your immortal chicken, discover the truth behind your sudden spaceship crash. Craft tools, pilot vehicles, and even control space stations to survive and explore the wreckage.
The Aegis Carrier Fleet merges human skill with unmatched AI control, IRRA. Control the most advanced aircraft into lethal battle zones, where your squadrons act with precision to secure decisive victories.
Set in the distant Gordon System in 3001, Nebula Complex Survival is an open-world, story-driven game. After crash landing on Dylan-4, explore, craft, and fight for survival. Discover a crucial radio station to signal for help while facing natural and artificial threats. Can you survive?
You are the only person on Earth who is capable of defeating aliens, and the entire world is in hiding in despair. Play as half-alien half-human Tyler in this open-world stylized alien shooter game, and fight terrifying spiders and other alienated creatures. It is up to you to stop this apocalypse.
Will you save humanity? You are on a mission to find a new planet for humans to inhabit. In this story driven FPS space opera you will explore open world planets, find weapons, upgrade your character, and befriend alien species.
Give feedback or send a smile 😊 here and check out these great games:
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Ozone Wipeout is a post apocalyptic zombie survival game in a procedurally generated open world. Staying alive is your only goal which is much easier said than done. Harsh weather conditions, zombies and resource scarcity are only a few of many things you will have to deal with.
Space Freighter it is a space cooperative game where you and your friends have to fulfill orders for cargo transportation in a distant galaxy. Cope with unforeseen events and survive! Dynamic gameplay and exciting missions await you!
Dive into a thrilling survival adventure where an unknown liquid takes control of your life. Extract Serum to stay alive, battle dangerous creatures, solve puzzles, and uncover clues about past events.
Sinking Eternity is a single-player underwater exploration RPG. Survive extreme depths, hide from dangerous sea creatures, and uncover the secrets of a civilization lost for millennia.
In the vastness of space, you are a lone robot desperately trying to survive. Build, explore, and fight for your life as you face deadly threats in the asteroid belt. This hardcore game shows no mercy—dangers lurk at every step, ready to destroy you at any moment.
Deadline Escape is a Low Poly Extraction Looter Shooter that throws you into a Post-Apocalyptic World. Scavenge for valuable resources, face deadly enemies and fight for your survival as the clock ticks down toward the deadline.
Return: Unknown, a survival-adventure game set in a post-apocalyptic Manhattan. Once a thriving metropolis, now abandoned by civilization after the outbreak of a global virus, it offers both challenges and countless possibilities.
Powered by id’s revolutionary id Tech® 5 technology, RAGE is an intense first-person shooter with breakneck vehicle combat, an expansive world to explore, and jaw-dropping graphics!
Story-driven RPG with survival elements. Open seamless world, first person view. Adventures on an island where intelligent life has been destroyed by a zombie virus.
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