Have you got what it takes to survive on Mars? ROKH is a multiplayer survival game featuring scientific realism and extremely deep crafting and building. Make the red planet your sandbox and create a thriving colony.
| Windows · Multi-player · Online Multi-Player · Local Multi-Player · Co-op · Online Co-op · Local Co-op · Steam Trading Cards
Explore space and build on other worlds in Star Rangers! Star Rangers is a space exploration and construction game that allows players to build habitats and spacecraft, acquire gear and explore the solar system.
Design and then improve the ultimate mothership. Explore a persistent living galaxy populated by 200 unique captains that can do everything you can do. Survive the zombie infection and then fight them back. Make allies and start your own faction. Build your empire. Also includes Sandbox Mode.
| | | | | Windows · Mac · Linux · Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Steam Cloud · Stats
Explore the vast reaches of VoidExpanse -- mine asteroids, upgrade your ship, trade, complete missions, advance your character and survive fast-paced combat with hostile aliens and mercenaries in the rich and exciting Sci-Fi universe of VoidExpanse!
Captain your own space ship and roam the galaxy in 3D in this tactical space simulator with tons of RPG depth ! Space has never looked so inviting - but images can betray...It has been two years since the end of the second Gemini war, the situation in the wartorn system is further from resolution than ever.
The ultimate space sandbox. Participate in epic fleet battles, form alliances, strive to dominate entire galaxies and harness the universe’s resources for your industrious empire or the destruction of others. Customise your experience, the universe is yours!
| | Windows · Mac · Linux · Single-player · Multi-player · Online Multi-Player · Local Multi-Player · Co-op · Online Co-op · Local Co-op · Cross-Platform Multiplayer · Partial Controller Support · Stats
Signs of Life is a sci-fi survival sandbox platformer with a combination of procedurally generated and hand-crafted content. You'll explore mysterious locations, Mine blocks for resources, and meet strange (and some familiar) creatures, some of which don't even want to kill you and eat your corpse.
Suit up as an operative of the Ark Corporation, sent to the farthest reaches of the universe in search of habitable planets to terraform. However, after the long space journey you awaken from cryosleep to find that your ship has gone way off course and is disabled near a strange new world.
GRAV is a sand box experience where you explore a multitude of planets, hunt strange alien creatures, build and defend outposts, craft weapons and armor, and attempt to survive against other players in a hostile environment.
Windows · Single-player · Multi-player · Co-op · Partial Controller Support
SurvivalOpen WorldBase BuildingSandboxMultiplayer
This is an unlisted pre-alpha version of STN and is a WORK IN PROGRESS. Please only consider purchasing the game if you're interested in testing builds and fleshing out features. Many features are missing, many features need balancing!
| | Windows · Mac · Online Multi-Player · Cross-Platform Multiplayer · Steam Achievements · Stats
Early AccessCraftingMassively MultiplayerPost-apocalypticRPG
Xsyon is a player driven apocalyptic fantasy sandbox MMORPG, set in a living and evolving environment. Players create the world they want to live in as they form tribes, construct towns, shape landscapes, create quests, hunt, farm, gather, build societies and develop a New World.
Planet Explorers is an open world sandbox adventure RPG game set on a distant planet. The game uses a new OpenCL calculated voxel system to allow players to change the terrain in any way, create new objects such as weapons, vehicles, objects, and do it anywhere.
Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive.
Base BuildingSurvivalResource ManagementBuildingSingleplayer
Azulgar: Star Commanders is a Sci-Fi open world sandbox game that puts you in a command of your own custom made space ship. Explore aftermath of the Azulgar event that reshaped the face of the solar system.
Windows · Single-player · Multi-player · Online Multi-Player
It's one year after the collapse of civilization and self-centered hedge fund manager Joe Wheeler emerges from his specially constructed bunker in search of food. This is a huge open-world RPG where you have the freedom to play how you want - but your choices have consequences.
| | | Windows · Single-player · Online Co-op · Steam Achievements · Full controller support · Steam Trading Cards · Steam Cloud
A sci-fi colony sim driven by an intelligent AI storyteller. Inspired by Dwarf Fortress and Firefly. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.
Space Engineers is a sandbox game about engineering, construction, exploration and survival in space and on planets. Players build space ships, space stations, planetary outposts of various sizes and uses, pilot ships and travel through space to explore planets and gather resources to survive.
| | Windows · Single-player · Multi-player · Online Multi-Player · Co-op · Steam Achievements · Steam Workshop · Partial Controller Support · Steam Cloud · Includes level editor
Empyrion - Galactic Survival is a 3D open world space sandbox survival adventure. Build powerful ships, mighty space stations and vast planetary settlements to explore, conquer or exploit a variety of different planets and discover the mysteries of Empyrion!
Windows · Multi-player · Partial Controller Support · Valve Anti-Cheat enabled
Deuterium Wars is a rapid 2D shooter. Create your own aircraft and plunge into heated battle with other players. What awaits you: an extensive role-playing system, craft, trading, and much more on a single server for all platforms.
Become the captain of a interstellar cruiser and cross the galaxy to save the Republic. During your journey you will have to make important decisions, improve the weaponry of your ship and fight against numerous enemies.
Trapped as an asteroid mining prisoner, explore, mine and craft to find unique ways to escape from the Mining Barge that is under control of an advanced AI alien race. Explore an procedural generated open world with fully destructible environments governed by Newtonian physics in this space flight sim, psychological survival horror game.
| | | | | | Windows · Mac · Linux · Single-player · Steam Achievements · Full controller support · Steam Trading Cards · Steam Workshop · Steam Cloud · Includes level editor
Build insane, fully customisable robot battle vehicles that drive, hover, walk and fly in the free-to-play action game Robocraft. Add weapons from the future and jump in the driving seat as you take your creation into battle against other players online!