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Sandbox

A game in which the player is not constrained to achieving specific goals and has a large degree of freedom to explore, interact with, or modify the game environment 

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Sci-fi

Science-fiction. Commonly including things like aliens, advanced technology, and settings of outer space or distant planets. 

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sci-fi

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COLD DEPTH is an immersive sim, focused on exploration, problems solving, and puzzles.
Survival
Sci-fi action adventure with a focus on creative item use and movement
Action
FREE DEMO AVAILABLE
Role Playing
Solve puzzles and master physics while discovering the Moon!
Puzzle
A Classic 2004 GameMaker Game By Shawn Noel
Action
Выживание-песочница в антиутопичном фантастическом мире
Survival
This is an Endless FPS Shooter, The More enemies you kill the bigger the crowd
Survival
Colonies End is a sci-fi, survival, adventure, sandbox game set among the stars.
Survival
Space is not the safest place
Shooter
Play in browser
A 2D Sci Fi Sandbox MMORPG
Role Playing
Play in browser
Marooned in a dangerous nebula, you must scavenge for resources and expand your craft to navigate the hostility of space
Survival
Come defend the solar system which is invaded by enemy ships. Before playing it is imperative to look at the tutorial.
Adventure
Play in browser
Defend humanity against the A.I. threat in this instant action real-time strategy, tower defense hybrid.
Strategy
Build your ship. Tweak your ship.
Simulation
Craft, explore, and battle in an open-world hovercraft simulation game!
Simulation
Manage your colony and supply chains in an asteroid field, where resources are limited and everything is breakable.
Simulation
Angry Box - The 3D Platform Game is Infinite Side Scrolling 3D Sci - Fi Platform Game Angry Box Is HD Platform Game
Action
Open source 2-D freeform space mystery game.
Adventure
Starfox meets Fez - A roguelike spaceshooter with 3D and 2D combat.
Action
Retro-styled aircraft-building game
Simulation
Explore the world of spaceflight
Simulation
Explore a hand-crafted universe, land on planets, moons and travel by foot.
Adventure
A Science Fiction Action RPG
Role Playing
Trapped on a tiny planet
Survival
Halo 3 Sandbox: Explore this strange environment and uncover the mystery of what the Shrine Defenders are protecting.
Adventure
Guided evolution game. Draw anything you want and it comes to life.
Simulation
Create your own space battles!
Action
They can go anywhere in the universe. Except home.
Simulation
Ludum Dare 45 Jam Entry. Theme: Start with nothing.
Simulation
Space station construction.
Survival
2D factory building game similar to Factorio, Satisfactory etc.
Create your own star system, customize stars, planets and moons, and watch their orbital patterns!
Educational
Play in browser
A Sci-Fi game about surviving on different procedurally generated planets.
Survival
A space survival, progression, and technology game.
Survival
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