| Name | | Reviews | Release Date | Tags |
 | No Man's Sky | 303,903 | Aug. 12, 2016 | Action Adventure Atmospheric Crafting Exploration First-Person FPS Indie Multiplayer Open World Open World Survival Craft Procedural Generation Sandbox Sci-fi Simulation Singleplayer Space Space Sim Survival VR |
 | Oxygen Not Included | 130,934 | July 30, 2019 | 2D Adventure Base Building Building Colony Sim Difficult Exploration Indie Management Multiplayer Open World Resource Management Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Survival |
 | Starfield | 112,930 | Sept. 5, 2023 | Action Action-Adventure Action RPG Adventure Atmospheric Character Customization Cinematic Exploration First-Person Great Soundtrack Moddable Open World Realistic RPG Sci-fi Singleplayer Space Space Sim Story Rich Third Person |
 | Kerbal Space Program | 109,968 | April 27, 2015 | Adventure Building Comedy Difficult Education Exploration Funny Indie Moddable Open World Physics Replay Value Sandbox Science Sci-fi Simulation Singleplayer Space Space Sim Strategy |
 | Space Engineers | 99,664 | Feb. 28, 2019 | Action Base Building Building Combat Co-op Exploration Moddable Multiplayer Open World Physics PvE PvP Realistic Sandbox Simulation Singleplayer Space Space Sim Strategy Survival |
 | Dyson Sphere Program | 82,136 | Jan. 20, 2021 | 3D Automation Base Building Building Casual City Builder Early Access Indie Management Open World Resource Management RTS Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Third Person |
 | Elite Dangerous | 80,583 | April 2, 2015 | Action Adventure Difficult Exploration First-Person Massively Multiplayer Multiplayer Online Co-Op Open World RPG Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy TrackIR Trading VR |
 | FTL: Faster Than Light | 61,781 | Sept. 14, 2012 | 2D Adventure Choose Your Own Adventure Difficult Indie Perma Death Procedural Generation Real-Time with Pause Replay Value Roguelike Roguelite Sci-fi Simulation Singleplayer Space Space Sim Strategy Survival Tactical Top-Down |
 | EVE Online | 38,520 | Dec. 15, 2010 | Adventure Character Customization Co-op Difficult Economy Exploration Lore-Rich Massively Multiplayer Mining Open World PvE PvP Sandbox Sci-fi Simulation Space Space Sim Strategy Third Person Trading |
 | Empyrion - Galactic Survival | 28,971 | Aug. 5, 2020 | Building Co-op Crafting Exploration FPS Multiplayer Open World Open World Survival Craft Physics PvE PvP Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Survival Voxel |
 | Surviving Mars | 28,388 | March 15, 2018 | Base Building Building City Builder Colony Sim Futuristic Great Soundtrack Management Mars Moddable Open World Resource Management RTS Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Survival |
 | Kerbal Space Program 2 | 27,350 | Feb. 24, 2023 | Adventure Atmospheric Building Difficult Early Access Exploration Funny Indie Moddable Multiplayer Open World Physics Realistic Sandbox Science Sci-fi Simulation Singleplayer Space Space Sim |
 | Universe Sandbox | 26,537 | Aug. 24, 2015 | Atmospheric Casual Destruction Early Access Education Exploration Family Friendly God Game Indie Open World Physics Realistic Relaxing Sandbox Science Sci-fi Simulation Singleplayer Space Space Sim |
 | STAR WARS™: Squadrons | 24,737 | Oct. 1, 2020 | Action Adventure Controller Co-op Female Protagonist First-Person Flight FPS Multiplayer Online Co-Op PvP Sci-fi Shooter Simulation Singleplayer Space Spaceships Space Sim Strategy VR |
 | X4: Foundations | 23,543 | Nov. 30, 2018 | 3D 4X Action Atmospheric Building Economy Exploration First-Person Flight Management Moddable Open World Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Trading |
 | Hardspace: Shipbreaker | 18,911 | May 24, 2022 | Action Building Destruction Dystopian Early Access First-Person Futuristic Great Soundtrack Open World Physics Procedural Generation Puzzle Relaxing Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy |
 | Star Conflict | 15,095 | Feb. 27, 2013 | 3D Action Aliens Atmospheric Choose Your Own Adventure Crafting Flight Free to Play Massively Multiplayer Online Co-Op Open World PvE RPG Sandbox Science Sci-fi Shooter Space Sim Third Person Trading |
 | SpaceEngine | 14,416 | June 11, 2019 | 3D Atmospheric Casual Colorful Early Access Education Flight Futuristic Indie Open World Procedural Generation Realistic Relaxing Sandbox Science Sci-fi Simulation Singleplayer Space Space Sim |
 | Marauders | 13,413 | Oct. 3, 2022 | Action Alternate History Atmospheric Early Access Extraction Shooter First-Person FPS Loot Looter Shooter Military Open World Perma Death Pirates PvP Realistic Shooter Space Space Sim Tactical War |
 | Marauders: Tech Test | 13,410 | Sept. 6, 2022 | Action Alternate History Atmospheric Early Access Extraction Shooter First-Person FPS Loot Looter Shooter Military Open World Perma Death Pirates PvP Realistic Shooter Space Space Sim Tactical War |
 | Avorion | 12,792 | March 9, 2020 | 3D Action RPG Building Choose Your Own Adventure Economy Exploration Flight Management Open World PvE Sandbox Sci-fi Simulation Space Spaceships Space Sim Third Person Trading Vehicular Combat Voxel |
 | Cosmoteer Beta Test | 11,646 | March 14, 2025 | 2D Adventure Atmospheric Building Difficult Early Access Exploration Indie Multiplayer Online Co-Op Pixel Graphics Real-Time with Pause Sci-fi Simulation Singleplayer Space Spaceships Space Sim Strategy Survival |
 | Cosmoteer: Starship Architect & Commander | 11,642 | Oct. 24, 2022 | 2D Adventure Atmospheric Building Difficult Early Access Exploration Indie Multiplayer Online Co-Op Pixel Graphics Real-Time with Pause Sci-fi Simulation Singleplayer Space Spaceships Space Sim Strategy Survival |
 | Sins of a Solar Empire®: Rebellion | 10,189 | June 12, 2012 | 3D 4X Base Building Co-op Diplomacy Exploration Grand Strategy Management Military Multiplayer Online Co-Op Replay Value RTS Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy |
 | EVERSPACE™ | 9,736 | May 25, 2017 | 6DOF Action Action Roguelike Arcade Difficult Exploration First-Person Flight Great Soundtrack Indie Roguelike Roguelite Sci-fi Shooter Simulation Singleplayer Space Space Sim Survival VR |
 | Planetbase | 9,385 | Oct. 15, 2015 | Adventure Atmospheric Base Building Building City Builder Colony Sim Crafting Indie Management Open World Resource Management RTS Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Survival |
 | Space Haven | 8,999 | May 21, 2020 | Base Building Building City Builder Colony Sim Early Access Exploration Indie Management Open World Pixel Graphics Post-apocalyptic Resource Management Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Survival |
 | Spaceflight Simulator | 7,634 | Feb. 17, 2022 | 2.5D 2D Atmospheric Building Crafting Early Access Exploration Indie Moddable Open World Physics Realistic Sandbox Science Sci-fi Simulation Singleplayer Space Spaceships Space Sim |
 | Rebel Galaxy | 7,149 | Oct. 20, 2015 | 2D Action Adventure Arcade Atmospheric Exploration Great Soundtrack Indie Open World RPG Sandbox Sci-fi Shooter Simulation Singleplayer Space Space Sim Strategy Third Person Trading |
 | Deliver Us The Moon | 7,106 | Oct. 10, 2019 | Action Action-Adventure Adventure Atmospheric Drama Exploration First-Person Indie Mystery Puzzle Sci-fi Short Simulation Singleplayer Space Space Sim Story Rich Survival Third Person Walking Simulator |
 | Endless Sky | 6,952 | Oct. 30, 2015 | 2D Action Adventure Casual Economy Exploration Free to Play Indie Open World RPG Sandbox Sci-fi Simulation Singleplayer Space Space Sim Story Rich Strategy Top-Down Trading |
 | Void Crew | 6,327 | Nov. 25, 2024 | 3D Action Action-Adventure Adventure Character Customization Colorful Co-op Exploration First-Person Flight Futuristic Indie Multiplayer Online Co-Op PvE Roguelite Sci-fi Singleplayer Space Space Sim |
 | Starbase | 6,171 | July 29, 2021 | Action Building Crafting Destruction Early Access Exploration First-Person FPS Massively Multiplayer Multiplayer Open World Open World Survival Craft Programming Robots Sandbox Sci-fi Simulation Space Space Sim Voxel |
 | X Rebirth | 5,147 | Nov. 15, 2013 | Action Adventure Atmospheric Economy Exploration First-Person Flight Great Soundtrack Management Moddable Open World Sandbox Sci-fi Shooter Simulation Singleplayer Space Space Sim Strategy Trading |
 | Wildgate Community Preview | 4,907 | March 10, 2025 | Action Adventure Battle Royale Co-op Extraction Shooter First-Person FPS Looter Shooter Multiplayer Online Co-Op PvE PvP RPG Sci-fi Shooter Space Spaceships Space Sim Strategy Team-Based |
 | Exo One | 4,907 | Nov. 18, 2021 | 3D 3D Platformer Adventure Atmospheric Controller Exploration Flight Linear Mystery Philosophical Physics Psychedelic Realistic Relaxing Sci-fi Simulation Space Space Sim Story Rich Walking Simulator |
 | Wildgate | 4,907 | July 22, 2025 | Action Adventure Battle Royale Co-op Extraction Shooter First-Person FPS Looter Shooter Multiplayer Online Co-Op PvE PvP RPG Sci-fi Shooter Space Spaceships Space Sim Strategy Team-Based |
 | SpaceBourne 2 | 4,810 | Nov. 18, 2025 | 3D Artificial Intelligence Base Building Building Crafting Economy First-Person Flight Lore-Rich Management Mining Open World Political RPG Science Space Space Sim Strategy Third Person War |
 | Star Trucker | 4,593 | Sept. 3, 2024 | Adventure America Atmospheric Automobile Sim Driving Exploration First-Person Futuristic Immersive Sim Moddable Open World Physics Relaxing Sandbox Sci-fi Simulation Space Space Sim Survival Transportation |
 | PULSAR: Lost Colony | 4,383 | June 22, 2021 | Action Adventure Character Customization Class-Based Co-op Exploration First-Person FPS Multiplayer Nonlinear Online Co-Op Open World PvE Robots RPG Sci-fi Simulation Space Spaceships Space Sim |
 | Starcom: Unknown Space Playtest | 4,181 | May 7, 2022 | 2D Action Action-Adventure Action RPG Adventure Aliens Atmospheric Building Combat Exploration Indie Lore-Rich Open World RPG Sci-fi Singleplayer Space Space Sim Story Rich Top-Down Shooter |
 | Starcom: Unknown Space | 4,178 | Sept. 2, 2024 | 2D Action Action-Adventure Action RPG Adventure Aliens Atmospheric Building Combat Exploration Indie Lore-Rich Open World RPG Sci-fi Singleplayer Space Space Sim Story Rich Top-Down Shooter |
 | Space Engineers 2 | 3,981 | Jan. 27, 2025 | Building Crafting Destruction Early Access Exploration Indie Mining Moddable Open World Physics Realistic Sandbox Science Sci-fi Simulation Singleplayer Space Space Sim Strategy Survival |
 | Chorus | 3,683 | Dec. 3, 2021 | Action Adventure Arcade Difficult Exploration Female Protagonist Flight Futuristic Indie Multiplayer Open World Sci-fi Shooter Singleplayer Space Spaceships Space Sim Story Rich Third Person |
 | Star Traders: Frontiers | 3,622 | July 31, 2018 | 2D Difficult Economy Management Moddable Open World Perma Death Procedural Generation Replay Value Roguelite RPG Sandbox Sci-fi Simulation Space Space Sim Strategy Tactical RPG Trading Turn-Based Combat |
 | Dune: Imperium | 3,451 | March 13, 2024 | Board Game Card Game Choices Matter Combat Deckbuilding Dystopian Economy Fantasy Futuristic Grand Strategy Lore-Rich Military Political Sci-fi Simulation Space Space Sim Strategy Tabletop Top-Down |
 | Dune: Imperium Playtest | 3,451 | July 3, 2024 | Board Game Card Game Choices Matter Combat Deckbuilding Dystopian Economy Fantasy Futuristic Grand Strategy Lore-Rich Military Political Sci-fi Simulation Space Space Sim Strategy Tabletop Top-Down |
 | Star Trek: Voyager - Across the Unknown | 3,426 | Feb. 18, 2026 | 3D Aliens Choices Matter Choose Your Own Adventure Combat Drama Exploration Futuristic Indie Interactive Fiction Lore-Rich Management Nostalgia Roguelike Sci-fi Space Space Sim Strategy Survival Tactical |
 | Mars First Logistics | 3,258 | Sept. 25, 2025 | 3D Building Co-op Exploration Funny LEGO Logic Mars Open World Physics Procedural Generation Puzzle Robots Sandbox Science Simulation Singleplayer Space Sim Stylized Transportation |
 | Star Trek: Bridge Crew | 3,252 | May 30, 2017 | Action Adventure Co-op Multiplayer RPG Sci-fi Simulation Singleplayer Space Space Sim VR |
 | 60 Parsecs! | 3,206 | Sept. 18, 2018 | 2D Cold War Comedy Dark Humor Exploration Funny LGBTQ+ Life Sim Management Outbreak Sim Point & Click Romance RPG Sci-fi Space Sim Strategy Text-Based Turn-Based Strategy Turn-Based Tactics Wrestling |
 | Starpoint Gemini Warlords | 3,058 | May 23, 2017 | 4X Base Building Controller Flight Grand Strategy Indie Moddable Open World RPG Sandbox Sci-fi Simulation Singleplayer Space Spaceships Space Sim Strategy Strategy RPG Tactical RPG Third Person |
 | Starpoint Gemini 2 | 3,015 | Sept. 26, 2014 | 3D Action Atmospheric Destruction Flight Futuristic Indie Moddable Open World RPG Science Sci-fi Simulation Singleplayer Space Spaceships Space Sim Tactical RPG Third Person Trading |
 | Star Trek: Infinite | 2,983 | Oct. 12, 2023 | 3D 4X Choices Matter Diplomacy Exploration Flight Grand Strategy Management Military Open World PvE PvP RTS Sandbox Science Simulation Space Space Sim Story Rich Strategy |
 | Juno: New Origins | 2,954 | Jan. 26, 2023 | Automation Base Building Building Education Exploration Flight Indie Jet Level Editor Moddable Open World Physics Programming Realistic Replay Value Sandbox Science Singleplayer Space Space Sim |
 | First Class Trouble | 2,938 | Nov. 1, 2021 | 3D Action Casual Conspiracy Co-op Dark Humor Difficult Funny Minigames Multiplayer Online Co-Op Party Party Game PvP Retro Robots Social Deduction Space Sim Survival Third Person |
 | First Class Trouble Playtest | 2,936 | April 4, 2021 | 3D Action Casual Conspiracy Co-op Dark Humor Difficult Funny Minigames Multiplayer Online Co-Op Party Party Game PvP Retro Robots Social Deduction Space Sim Survival Third Person |
 | Pixel Starships | 2,918 | May 23, 2023 | 2D 4X Aliens Anime Automation Base Building Building Free to Play Massively Multiplayer Multiplayer Pixel Graphics Post-apocalyptic Roguelike RPG Sci-fi Space Space Sim Strategy Turn-Based Tactics Wargame |
 | ΔV: Rings of Saturn | 2,748 | July 21, 2023 | 2D Action Atmospheric Casual Difficult Exploration Immersive Sim Open World Physics Procedural Generation Realistic Sandbox Science Sci-fi Simulation Singleplayer Space Space Sim Top-Down Vehicular Combat |
 | Astrometica Playtest | 2,733 | March 28, 2024 | Adventure Automation Base Building Crafting Early Access Exploration First-Person Indie Inventory Management Open World Open World Survival Craft Resource Management Sci-fi Simulation Singleplayer Space Space Sim Survival |
 | Astrometica | 2,731 | Dec. 10, 2024 | Adventure Automation Base Building Crafting Early Access Exploration First-Person Indie Inventory Management Open World Open World Survival Craft Resource Management Sci-fi Simulation Singleplayer Space Space Sim Survival |
 | Mars Horizon | 2,729 | Nov. 17, 2020 | Alternate History Building Choices Matter Education Exploration Historical Immersive Sim Logic Management Mars Physics Resource Management Science Simulation Singleplayer Space Space Sim Strategy Stylized Turn-Based |
 | Space Pirates And Zombies 2 | 2,723 | Nov. 7, 2017 | Action Adventure Building Exploration Gore Indie Open World Pirates Procedural Generation RPG Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Survival VR Zombies |
 | Ostranauts | 2,319 | Sept. 10, 2020 | Cyberpunk Difficult Early Access Exploration Flight Immersive Sim Life Sim Open World Procedural Generation Roguelike RPG Sandbox Sci-fi Simulation Space Spaceships Space Sim Survival Top-Down Trading |
 | Starcom: Nexus | 2,238 | Dec. 12, 2019 | 2D Action Action RPG Adventure Beautiful Building Exploration Indie Open World RPG Sci-fi Singleplayer Space Space Sim Story Rich Top-Down |
 | Astro Colony | 2,205 | June 2, 2026 | Action Adventure Automation Base Building Building Casual Colony Sim Crafting Early Access Exploration First-Person Indie Multiplayer Open World Resource Management Sandbox Simulation Space Space Sim Strategy |
 | Astro Colony Beta | 2,204 | Dec. 14, 2021 | Action Adventure Automation Base Building Building Casual Colony Sim Crafting Early Access Exploration First-Person Indie Multiplayer Open World Resource Management Sandbox Simulation Space Space Sim Strategy |
 | StarMade | 2,193 | Dec. 4, 2014 | Action Adventure Building Co-op Crafting Early Access Exploration Indie Massively Multiplayer Multiplayer Open World RPG Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Voxel |
 | X3: Terran Conflict | 2,068 | Oct. 16, 2008 | 4X Action Atmospheric Capitalism Economy Exploration First-Person Flight Great Soundtrack Management Moddable Open World Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Trading |
 | Between the Stars | 1,905 | March 7, 2024 | 3D Action Adventure Early Access Exploration Flight Indie Open World Roguelike Roguelite RPG Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Survival Tactical RPG |
 | House of the Dying Sun | 1,903 | Nov. 1, 2016 | Action First-Person Flight Great Soundtrack Indie Sci-fi Shooter Short Simulation Singleplayer Space Space Sim Strategy Tactical VR |
 | Take On Mars | 1,748 | Feb. 9, 2017 | Adventure Building Co-op Early Access Education Exploration First-Person Futuristic Mars Moddable Multiplayer Open World Realistic Sandbox Science Simulation Singleplayer Space Space Sim Survival |
 | Nimbatus - The Space Drone Constructor | 1,734 | May 14, 2020 | Action Adventure Automation Building Crafting Exploration Logic Open World Physics Programming Puzzle Robots Sandbox Sci-fi Singleplayer Space Space Sim Sports Strategy Survival |
 | Space Crew: Legendary Edition | 1,647 | Oct. 15, 2020 | 3D Action Adventure Cartoony Comedy Difficult Indie Management Perma Death Replay Value Roguelike Roguelite Sci-fi Simulation Singleplayer Space Space Sim Strategy War Wargame |
 | Executive Assault 2 | 1,568 | Oct. 18, 2023 | Action Action RTS Base Building Building Co-op Early Access First-Person FPS Multiplayer Real-Time Real Time Tactics Robots RTS Sci-fi Shooter Singleplayer Space Space Sim Strategy War |
 | Solar 2 | 1,553 | June 17, 2011 | 2D Abstract Atmospheric Casual Comedy Controller God Game Indie Open World Physics Procedural Generation Relaxing Sandbox Sci-fi Short Simulation Singleplayer Space Space Sim Top-Down |
 | Industries of Titan | 1,540 | Jan. 31, 2023 | 4X Base Building Building City Builder Colony Sim Cyberpunk Dark Exploration Futuristic Post-apocalyptic Real-Time with Pause Resource Management Sci-fi Simulation Singleplayer Space Space Sim Strategy Tactical Voxel |
 | Industries of Titan Playtest | 1,540 | June 3, 2021 | 4X Base Building Building City Builder Colony Sim Cyberpunk Dark Exploration Futuristic Post-apocalyptic Real-Time with Pause Resource Management Sci-fi Simulation Singleplayer Space Space Sim Strategy Tactical Voxel |
 | Genesis Alpha One Deluxe Edition | 1,535 | Feb. 25, 2020 | 3D Action Roguelike Base Building Building First-Person FPS Horror Management Multiple Endings Open World Post-apocalyptic Procedural Generation Roguelike Roguelite Science Sci-fi Space Space Sim Survival Survival Horror |
 | The Sandbox Evolution - Craft a 2D Pixel Universe! | 1,513 | Nov. 15, 2016 | 2D Action Crafting Destruction Free to Play God Game Indie Multiplayer Ninja Physics Pixel Graphics Platformer Puzzle Platformer Sandbox Simulation Space Sim |
 | Galaxy on Fire 2™ Full HD | 1,444 | Aug. 21, 2012 | 3D 3D Fighter 3D Vision Action Action-Adventure Adventure Arcade Atmospheric Exploration Flight Historical Linear Sci-fi Shooter Simulation Singleplayer Space Space Sim Third Person Third-Person Shooter |
 | Stardeus | 1,400 | Oct. 12, 2022 | 2D Base Building Colony Sim Crafting Early Access Exploration God Game Management Moddable Open World Procedural Generation Resource Management Sandbox Sci-fi Simulation Singleplayer Space Space Sim Strategy Survival |
 | Interstellar Rift | 1,400 | Sept. 24, 2020 | 3D Action Adventure Aliens Atmospheric Building Crafting Exploration First-Person Futuristic Mining Open World PvP Sandbox Sci-fi Simulation Space Space Sim Survival Trading |
 | Kinetic Void | 1,382 | Nov. 21, 2014 | Action Adventure Building Early Access Indie Open World Sandbox Sci-fi Simulation Singleplayer Space Space Sim |
 | The Last Starship Playtest | 1,380 | July 11, 2022 | 2D Automation Base Building Building Colony Sim Combat Early Access Exploration Indie Management Mining Sandbox Science Sci-fi Simulation Singleplayer Space Space Sim Strategy Top-Down |
 | The Last Starship | 1,380 | Feb. 3, 2026 | 2D Automation Base Building Building Colony Sim Combat Early Access Exploration Indie Management Mining Sandbox Science Sci-fi Simulation Singleplayer Space Space Sim Strategy Top-Down |
 | Farlands | 1,354 | July 16, 2026 | 2D Agriculture Building Casual Collectathon Crafting Cute Early Access Exploration Fantasy Farming Sim Fishing Futuristic Indie Life Sim Relaxing Resource Management Sandbox Simulation Space Sim |
 | The Long Journey Home | 1,316 | May 30, 2017 | 2D Adventure Difficult Exploration Indie Procedural Generation Roguelike RPG Sci-fi Simulation Singleplayer Space Space Sim Story Rich Strategy Survival |
 | Astrometica: Prologue | 1,282 | May 22, 2024 | Action Adventure Automation Base Building Building Crafting Early Access Exploration First-Person Free to Play Indie Inventory Management Open World Resource Management Sci-fi Singleplayer Space Spaceships Space Sim Survival |
 | Shortest Trip to Earth | 1,250 | Aug. 15, 2019 | 2D Action Roguelike Adventure Aliens Choices Matter Difficult Exploration Replay Value Resource Management Roguelike Roguelite Sci-fi Simulation Singleplayer Space Spaceships Space Sim Strategy Survival Tactical |
 | Rodina | 1,222 | July 28, 2014 | Action Adventure Aliens Atmospheric Controller Early Access Exploration Fast-Paced First-Person Great Soundtrack Indie Open World Procedural Generation Sandbox Sci-fi Simulation Singleplayer Space Space Sim Story Rich |
 | Strike Suit Zero | 1,208 | Jan. 23, 2013 | Action Anime Controller Flight Great Soundtrack Indie Kickstarter Mechs Robots Sci-fi Shooter Simulation Singleplayer Space Space Sim Third Person Third-Person Shooter |
 | Reentry - A Space Flight Simulator | 1,203 | Nov. 7, 2025 | 3D Adventure Atmospheric Difficult Education Exploration Flight Historical Immersive Sim Medieval Military Open World Physics Realistic Science Simulation Singleplayer Space Space Sim VR |
 | Astrox Imperium | 1,195 | March 22, 2019 | Atmospheric Early Access Exploration Indie Mining Open World Sandbox Sci-fi Simulation Singleplayer Space Space Sim |
 | Fractal Block World | 1,193 | Oct. 18, 2021 | 3D Action Adventure Combat Dungeon Crawler Exploration First-Person FPS Indie Moddable Nonlinear Old School Open World Psychedelic Shooter Singleplayer Space Space Sim Surreal Voxel |
 | Galaxy Idle Clicker | 1,135 | Aug. 6, 2025 | 1980s 2D Arcade Casual Choices Matter Clicker Colorful Early Access Free to Play Idler Indie Management Old School Resource Management Sci-fi Simulation Singleplayer Space Space Sim Time Management |
 | Stars End | 1,116 | Jan. 8, 2023 | Action Adventure Co-op Crafting Exploration FPS Massively Multiplayer Multiplayer Online Co-Op Open World Open World Survival Craft PvE PvP Real Time Tactics Sandbox Sci-fi Simulation Space Space Sim Survival |
 | Starship EVO | 1,113 | June 19, 2020 | Action Adventure Building Early Access Futuristic Indie Multiplayer Open World Physics Sandbox Sci-fi Simulation Singleplayer Space Spaceships Space Sim Voxel |
 | Redout 2 | 1,093 | June 16, 2022 | 3D Arcade Artificial Intelligence Automobile Sim Character Customization Colorful Combat Racing Competitive Controller Driving eSports Flight Physics PvP Racing Simulation Soundtrack Space Space Sim Sports |
 | Prosperous Universe | 1,038 | April 20, 2022 | Base Building Building Early Access Economy Inventory Management Management Massively Multiplayer MMORPG Multiplayer Open World Realistic Resource Management Sandbox Sci-fi Simulation Space Space Sim Strategy Text-Based Trading |