Top similar games like Star Replica:

A space sim where you build the industry that produces your rockets, then fly them. Genuinely integrated orbits, aerodynamics solved part by part, procedural planets you can walk. From first mine to first interstellar flight.

Space Travellers is a unique open-world sandbox space simulator set in the year 2343. Travel the galaxy, trade, explore unexplored worlds, fight, build bases and factories, forge alliances and experience new adventures!

Explore a seamless endless universe with an uncountable number of galaxies, stars, planets, and moons. Make friends or enemies with unique alien civilizations. Research upgrades for your vessel with scientific phenomena and alien tech that you've acquired.

An engineering/survival game where you summit the tallest mountain in a vast, uncharted world. For the journey, carefully construct flying wooden bases with realistic structural failures. Brave thunderstorms, freezing temperatures, bears and wolves. Answer the call of the untamed wilderness.

Main Sequence is a first-person space-sim factory builder where you design spaceships, build space stations, and automate everything. Start with a single ship and grow to become an interstellar industrial empire as you leave your mark on the galaxy.

Build a self-sustaining industrial empire in the deep sea of an ocean-covered alien world. Explore procedurally generated waters, automate resource production, and turn alien life into renewable industrial output through advanced bio-cultivation systems.

Perihelion lets you run your own rocket engine shop. Take over an abandoned desert airfield, design realistic, unique engines, then test them!

A procedurally generated open-world driving survival game where you scavenge, fight zombies and armed survivors, manage your vehicle, and adapt to a constantly changing world where every journey is different.

Desktop and VR interactive space experience/game. Fan homage to SpaceX's efforts of inspiring humanity to finally become a spacefaring civilization! Experience launches, flights and landings of starships first-hand, engage with challenging mini-games, explore funny memes and more. :-)

A surreal dream exploration game inspired by LSD: Dream Emulator and Yume Nikki. Enter doors to load randomized dream worlds based on real dreams — from peaceful to nightmarish. Explore, solve puzzles, and submit your own dreams to be added in future updates!

Calling Home is an exciting sci-fi simulation resource management game that draws heavily from games in the factory-building and exploration genres, providing a thrilling mix of building your base, researching, factory management, puzzle solving, exploration, and resource gathering.

A rock's solar system odyssey.

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.

Explore a universe of tiny planets, swing between worlds, and jump into handcrafted bubble scenes. Train simple AI companions to follow you and join your adventures. A playful physics sandbox you can enjoy solo, online, or in split-screen.

Arsilon - the adventure of astronaut Alice on another planet. After a crash landing, she needs to find and collect the lost spaceship components. On spacious maps, mortal dangers will lie in wait for her. To get to special places, you have to find a non-obvious path.

Survive on a mysterious island, gather resources, craft tools, and build a ship to escape—or explore freely in a larger open-world survival mode.

Dig beneath the pitch and uncover secrets no one was meant to find.

Solo Indie delivers a local 1-4 player split-screen physics-based create and combat sandbox with scientific tools for PvP or PvE. Replay many unique campaigns. Master your hex build strategy, microscopes, and chemistry skills. Be clever to achieve victory and learn as you go. !!! FREE DEMO !!!

Drive your mechnical ladybird across a procedural hellscape by making pipes to power machines with steam. Explore from inside the submarine-like Clomper: collecting resources, completing quests and repairing damage. Go solo or with a friend with co-op multiplayer.

A space sim survival where each decision costs power. Every system drains your dying reactor. Pilot a crippled spacecraft across a real-scale solar system using true orbital mechanics, manage critical systems, scavenge for resources, while you try to uncover why humanity seems to have disappeared.

AVIK is an atmospheric space sandbox where you explore space. Following a recent tragedy, you must begin your story from scratch, unraveling the mysteries of the past while upgrading your spaceship, mining resources, crafting new parts, and fighting for your survival.

A zen gliding and exploration game with procedurally generated music

A first-person music producer sim trillions of miles from home. Create music with TRAX Audio Engine: no theory, just tweak the dials until it sounds right. Press tracks to cassette, find aliens that like your music, solo or with friends. Beware the black hole in the sky: it's only a matter of time.

Space Hauler is a space flight sim set around Saturn's largest moon, Titan. Fly your spacecraft using realistic aerodynamics and orbital mechanics, take on contracts, and build your career as a pilot-for-hire.

A crash. Alone in a lab while war rages around you. Explore dark alien dungeons, mine rare minerals, build machines to survive and fight to uncover the truth buried deep below.

Welcome to this innovative sci-fi open-world! As the last survivor of humanity, build a home on a wild alien planet. Reignite civilization—from primal survival to advanced energy systems. Use the Planetary Control Module to reshape the world, uncover human secrets, and journey back to Earth.

A voxel sandbox focused on atmosphere and contrast. Explore layered worlds, survive eerie nights, and uncover what lies beneath the surface.

World Climate Lab is a real-time planetary climate simulator. Import your own terrain or sculpt a world in the topography editor, then watch a living climate emerge from physics: winds, oceans, cloud bands and ice. Every climate is calculated, not painted.

An open World Space Logistics Simulator set in the future where humanity have just started the BIG colonization effort of a new found world. Manage fuel economy and mine ores

Launch Window is a single player physics-based automation game where you establish supply chains across an entire solar system using orbital mechanics.

Rover Simulator allows you to experience the cosmos through the lens of a Rover. Explore celestial bodies across the galaxy in the pursuit of evidence pointing to signs of life as well as gaining a broader understanding of the universe to pave the way for colonization beyond the Earth.

A single-player and PvP multiplayer space shooter with hard-science weapons and physics.

Explore and unravel the mysteries of Rheksetor!