Games like Ostranauts on Steam
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Total Miner
Total Miner is an open world voxel sandbox game. It is primarily designed for creative RPG game builders, but also has two action/adventure style game modes where you can just jump in and play.
Starpoint Gemini Warlords
Strategy from the front lines! Starpoint Gemini Warlords combines 3rd person capital spaceship combat with 4X strategy and RPG gameplay elements. Build mighty war fleets and send them into battle or lead them into combat yourself. Become the Warlord and conquer the Gemini system!
TerraTech Worlds
TerraTech Worlds is an open world, build-craft adventure game, set on an uncharted alien world. Play solo or with friends, explore your surroundings, craft unique vehicles, construct automated bases, and battle your way through hazards and enemies to harness the power of your environment
The Scroll Of Taiwu
"The Scroll of Taiwu" is an indie game themed around Chinese mythology and wuxia. Players assume the role of the mysterious "heir of the Taiwu clan" in an alternate ancient China, working through generations of heirs to defeat a powerful hereditary enemy and shape the fate of the human world.
Streamer Life Simulator 2
In the second game of the series, competition has increased and now everyone wants to be a streamer. Are you ready to stream until your cpu burns out?
Astronomics
Top-down action and space exploration meet asteroid mining automation! Navigate to randomly generated asteroids passing by and start mining. Impress your employer, upgrade your equipment, fight off pirates and save up for that ticket to Earth so you can finally come home... for the very first time.
Motor Town: Behind The Wheel
Enjoy realistic driving in the open world. Relaxing cargo deliveries or driving buses and taxis will give you enough money to buy new cars and parts. You can test your driving skills at the race track. It's all about pure driving pleasure!
SPACERIFT: Arcanum System
At the sunset of human life on planet Earth, you are a military pilot controlling a space ship, and you find yourself at the very epicenter of the battle in the solar system. You are forced to retreat into the unknown, distant Arcanum system through hyper-jumping.
Necesse
Build, quest, and conquer across an infinite procedurally generated world. Play alone or with friends as you establish a settlement and explore deep dungeons, fight monsters and bosses, mine rare ores, craft magical equipment, recruit specialists for your colony, and more!
No Man's Sky
No Man's Sky is a game about exploration and survival in an infinite procedurally generated universe.
Mashinky
Mashinky is a transport strategy game about trains. The goal is to create your own transport empire on a procedurally generated map. It’s a unique blend of realistic graphics combined with an isometric construction mode and board game-like rules.
Frozen Flame
A challenging exploration and survival adventure, set in the dying world of Dragons. Only those who harness the power of Frozen Flame have the means to survive the harsh conditions of the realm and able to muster the strength to cleanse it for good.
Quasimorph
Take on a role of a hardened PMC fighter in a dark turn-based extraction RPG. Engage in unforgiving combat, manage your ship and pile up the bodies of your clones to unravel the dark mystery behind threat to all life.
Empyrion - Galactic Survival
Build and explore in a true space sandbox survival adventure. Construct mighty capital vessels, sprawling planetary settlements, and vast space stations in your galactic journey to discover the mysteries of Empyrion!
Eden Crafters
Embark on a journey of survival, crafting, and automation in Eden Crafters, a solo and co-op open-world game that challenges you to turn a hostile planet into a habitable haven for humanity. Temper the climate, create a breathable atmosphere, and turn toxic lakes into water: shape a new world!
Breakwaters: Crystal Tides
Survive in a world ravaged by massive Titans and an ever changing ocean sim. Displace water to find resources for building and crafting unique items. Swim, sail, and fly to explore new islands and fight Titans.
Amazing Frog? 2
Amazing Frog? 2 is the next generation of Amazing Frog? A Hardcore Parkour, open world buffet of bonkers physics sandbox ...ness.
The Doors of Trithius
The Doors of Trithius is an open-world RPG roguelike. Engage in tactical turn-based combat in a living world of warring factions, wandering behemoths, and ancient magic. Level your skills, cook, craft, and explore dungeons. Will you follow the story, or let adventure be your guide?
Rem Survival
Tackle starvation, dehydration, thermal conditions, radiation poisoning, and toxic gas inhalation while trying to keep your sanity intact. Shack up, cook some chicken, and make friends or enemies as you discover, explore, learn, build, and develop your skills needed for a true survival experience.
Planetary Life
Manipulate climate, add plants and evolve creatures in this planet and life sandbox simulation game. From cells to civilizations, spread life throughout the whole planet. Or just enjoy watching your creation burn!
The Pioneers: Surviving Desolation
Deep and innovative space survival simulation experience. Build your station, manage your crew and explore the harsh environment of Io, the innermost moon of Jupiter. Are you brave enough to survive?