| Name | | Reviews | Release Date | Tags |
 | Portal 2 | 374,906 | April 18, 2011 | 3D Platformer Action Action-Adventure Adventure Atmospheric Co-op Comedy Dark Humor FPS Female Protagonist First-Person Funny Level Editor Physics Platformer Puzzle Puzzle Platformer Sci-fi Science Story Rich |
 | Mac Portal | 163,341 | Oct. 10, 2007 | 3D Platformer Action Adventure Atmospheric Classic Comedy Dark Humor FPS Female Protagonist First-Person Funny Physics Platformer Puzzle Puzzle Platformer Sci-fi Science Short Singleplayer Story Rich |
| Portal | 163,341 | Oct. 10, 2007 | 3D Platformer Action Adventure Atmospheric Classic Comedy Dark Humor FPS Female Protagonist First-Person Funny Physics Platformer Puzzle Puzzle Platformer Sci-fi Science Short Singleplayer Story Rich |
 | Kerbal Space Program | 107,116 | April 27, 2015 | Adventure Building Comedy Difficult Education Exploration Funny Indie Moddable Open World Physics Replay Value Sandbox Sci-fi Science Simulation Singleplayer Space Space Sim Strategy |
 | The Outlast Trials | 72,134 | March 5, 2024 | Action Action-Adventure Adventure Alternate History Atmospheric Character Customization Co-op Dark Dark Humor First-Person Horror Management Multiplayer Psychological Horror PvE Realistic Science Stealth Survival Survival Horror |
 | The Outlast Trials Closed Beta | 70,722 | Oct. 28, 2022 | Action Action-Adventure Adventure Alternate History Atmospheric Character Customization Co-op Dark Dark Humor First-Person Horror Management Multiplayer Psychological Horror PvE Realistic Science Stealth Survival Survival Horror |
 | Spore | 63,511 | Dec. 19, 2008 | Adventure Aliens Cartoon Cartoony Casual Colony Sim Colorful Comedy Cute Exploration Family Friendly Funny God Game Open World Resource Management Sandbox Sci-fi Science Simulation Space |
 | Icarus | 44,076 | Dec. 3, 2021 | Adventure Base Building Building Co-op Crafting Exploration First-Person Mining Multiplayer Nature Online Co-Op Open World Open World Survival Craft PvE Realistic Sandbox Science Space Survival Third Person |
 | Abiotic Factor | 35,713 | July 22, 2025 | Adventure Aliens Base Building Building Co-op Campaign Crafting Early Access Exploration FPS First-Person Immersive Sim Multiplayer Online Co-Op Open World Survival Craft PvE Sandbox Sci-fi Science Simulation Survival |
 | Abiotic Factor Playtest | 35,559 | Dec. 12, 2023 | Adventure Aliens Base Building Building Co-op Campaign Crafting Early Access Exploration FPS First-Person Immersive Sim Multiplayer Online Co-Op Open World Survival Craft PvE Sandbox Sci-fi Science Simulation Survival |
 | Timberborn | 32,586 | Sept. 15, 2021 | 3D Automation Base Building Building City Builder Colony Sim Early Access Farming Sim Level Editor Management Nature Physics Post-apocalyptic Sandbox Science Simulation Strategy Stylized Survival Voxel |
 | The Talos Principle | 28,685 | Dec. 11, 2014 | Action Adventure Artificial Intelligence Atmospheric Difficult Exploration First-Person Great Soundtrack Indie Multiple Endings Mystery Philosophical Post-apocalyptic Puzzle Robots Sci-fi Science Simulation Singleplayer Story Rich |
 | Kerbal Space Program 2 | 26,899 | Feb. 24, 2023 | Adventure Atmospheric Building Difficult Early Access Exploration Funny Indie Moddable Multiplayer Open World Physics Realistic Sandbox Sci-fi Science Simulation Singleplayer Space Space Sim |
 | Cell to Singularity - Evolution Never Ends | 25,552 | Nov. 3, 2021 | Atmospheric Casual Clicker Dinosaurs Early Access Education Family Friendly Free to Play God Game Historical Idler Multiplayer Point & Click Sandbox Sci-fi Science Simulation Singleplayer Space Strategy |
 | Universe Sandbox | 25,541 | Aug. 24, 2015 | Atmospheric Casual Destruction Early Access Education Exploration Family Friendly God Game Indie Open World Physics Realistic Relaxing Sandbox Sci-fi Science Simulation Singleplayer Space Space Sim |
 | STEINS;GATE | 22,928 | Sept. 8, 2016 | Adventure Anime Atmospheric Casual Choices Matter Dating Sim Great Soundtrack Horror Memes Multiple Endings Mystery Psychological Horror Romance Sci-fi Science Singleplayer Story Rich Thriller Time Travel Visual Novel |
 | Automation - The Car Company Tycoon Game | 15,201 | March 12, 2015 | Automation Automobile Sim Building Crafting Early Access Economy Education Immersive Sim Indie Management Moddable Physics Racing Realistic Replay Value Sandbox Science Simulation Singleplayer Strategy |
 | Star Conflict | 15,000 | 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 Sci-fi Science Shooter Space Sim Third Person Trading |
 | SpaceEngine | 13,380 | June 11, 2019 | 3D Atmospheric Casual Colorful Early Access Education Flight Futuristic Indie Open World Procedural Generation Realistic Relaxing Sandbox Sci-fi Science Simulation Singleplayer Space Space Sim |
 | Liftoff | 11,982 | Sept. 13, 2018 | 3D Atmospheric Crafting Early Access Education Exploration First-Person Flight Immersive Sim Indie Level Editor Modern Multiplayer Parkour Racing Realistic Science Simulation Singleplayer Sports |
 | The Alters | 11,924 | June 13, 2025 | 3D Action Action-Adventure Adventure Base Building Crafting Exploration Futuristic Management Psychological Resource Management Sci-fi Science Singleplayer Space Story Rich Strategy Survival Third Person Time Management |
 | The Alters Playtest | 11,798 | May 23, 2025 | 3D Action Action-Adventure Adventure Base Building Crafting Exploration Futuristic Management Psychological Resource Management Sci-fi Science Singleplayer Space Story Rich Strategy Survival Third Person Time Management |
 | The Talos Principle 2 | 11,776 | Nov. 2, 2023 | 3D 3D Platformer Action-Adventure Exploration First-Person Linear Logic Lore-Rich Mystery Philosophical Political Post-apocalyptic Puzzle Puzzle Platformer Realistic Sci-fi Science Story Rich Third Person Walking Simulator |
 | Forza Motorsport | 11,066 | Oct. 9, 2023 | Automobile Sim Character Customization Driving Family Friendly First-Person Immersive Sim Management Multiplayer Open World Physics PvP Racing Realistic Science Simulation Singleplayer Sports Third Person Transportation VR |
 | Eco | 11,025 | Feb. 6, 2018 | Base Building Building Crafting Early Access Economy Education Immersive Sim Multiplayer Nature Open World Open World Survival Craft Political Sim Resource Management Sandbox Science Simulation Singleplayer Survival Trading Transportation |
 | WolfQuest: Anniversary Edition | 10,208 | July 22, 2025 | Action Action RPG Action-Adventure Co-op Education Exploration Hunting Immersive Sim Life Sim Multiplayer Nature Online Co-Op Open World PvE RPG Realistic Science Simulation Singleplayer Survival |
 | Ancestors: The Humankind Odyssey | 8,890 | Aug. 27, 2020 | Action Action-Adventure Adventure Atmospheric Choices Matter Crafting Exploration Historical Immersive Sim Indie Multiplayer Nature Open World Open World Survival Craft RPG Science Simulation Singleplayer Survival Third Person |
 | Steam Engine Simulator | 8,658 | June 7, 2023 | 2D Difficult Education Free to Play Great Soundtrack Indie Physics Psychological Horror Realistic Science Simulation Singleplayer Steam Machine Steampunk Story Rich |
 | Stationeers | 7,975 | Dec. 12, 2017 | Automation Base Building Building Co-op Colony Sim Crafting Early Access Logic Management Mining Moddable Multiplayer Physics Programming Resource Management Sandbox Sci-fi Science Space Survival |
 | Lucy -The Eternity She Wished For- | 7,666 | Feb. 28, 2016 | 2D Adventure Anime Casual Choose Your Own Adventure Cute Dating Sim Drama Fantasy Great Soundtrack Indie Multiple Endings Robots Romance Sci-fi Science Simulation Singleplayer Story Rich Visual Novel |
 | Aviassembly | 7,263 | April 11, 2025 | 3D Adventure Atmospheric Building Colorful Crafting Destruction Early Access Exploration Flight Jet Open World Physics Sandbox Science Simulation Singleplayer Strategy Stylized Transportation |
 | STEINS;GATE 0 | 7,220 | May 8, 2018 | Adventure Anime Artificial Intelligence Atmospheric Choices Matter Great Soundtrack Memes Multiple Endings Mystery Psychological Psychological Horror Romance Sci-fi Science Sexual Content Singleplayer Story Rich Time Travel Violent Visual Novel |
 | Forever Skies | 7,180 | April 14, 2025 | 3D Action Adventure Atmospheric Base Building Building Co-op Crafting Exploration First-Person Futuristic Multiplayer Open World Open World Survival Craft Post-apocalyptic Resource Management Sci-fi Science Singleplayer Survival |
 | Forever Skies Playtest | 7,157 | Dec. 5, 2024 | 3D Action Adventure Atmospheric Base Building Building Co-op Crafting Exploration First-Person Futuristic Multiplayer Open World Open World Survival Craft Post-apocalyptic Resource Management Sci-fi Science Singleplayer Survival |
 | while True: learn() | 7,076 | Jan. 17, 2019 | 2D Artificial Intelligence Building Cats Coding Dynamic Narration Education Indie Intentionally Awkward Controls Investigation Logic Programming Puzzle Sandbox Science Simulation Singleplayer Transhumanism Underground |
 | Spaceflight Simulator | 6,730 | Feb. 17, 2022 | 2.5D 2D Atmospheric Building Crafting Early Access Exploration Indie Moddable Open World Physics Realistic Sandbox Sci-fi Science Simulation Singleplayer Space Space Sim Spaceships |
 | Uncrashed : FPV Drone Simulator | 5,837 | Sept. 1, 2021 | 3D 6DOF Action Combat Racing Exploration First-Person Flight Immersive Sim Indie Physics Racing Realistic Science Simulation Singleplayer Sports VR |
 | The Invincible | 5,743 | Nov. 6, 2023 | Adventure Aliens Choices Matter Conversation Female Protagonist First-Person Futuristic Interactive Fiction Multiple Endings Mystery Narration Nonlinear Robots Sci-fi Science Singleplayer Space Story Rich Thriller Walking Simulator |
 | SpaceBourne 2 | 4,592 | 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 |
 | Prehistoric Kingdom | 4,434 | April 27, 2022 | 3D Adventure Atmospheric Building Dinosaurs Early Access Economy Education God Game Grand Strategy Indie Management RTS Resource Management Sandbox Sci-fi Science Simulation Singleplayer Strategy |
 | Ghost Exorcism INC | 4,256 | July 15, 2021 | 3D Action Artificial Intelligence Atmospheric Dark Demons Detective Early Access Foreign Horror Investigation Multiplayer Mystery Online Co-Op Realistic Science Singleplayer Supernatural Survival Horror Thriller |
 | Per Aspera | 3,977 | Dec. 3, 2020 | Automation Base Building Building City Builder Colony Sim Management Mars Moddable Multiplayer Online Co-Op Real-Time Resource Management Robots Sandbox Sci-fi Science Simulation Space Strategy Survival |
 | CHAOS;CHILD | 3,450 | Jan. 22, 2019 | Adventure Anime Atmospheric Emotional Gore Great Soundtrack Horror Multiple Endings Mystery Nudity Psychological Psychological Horror Sci-fi Science Sexual Content Singleplayer Story Rich Thriller Violent Visual Novel |
 | Space Engineers 2 | 3,279 | Jan. 27, 2025 | Building Crafting Destruction Early Access Exploration Indie Mining Moddable Open World Physics Realistic Sandbox Sci-fi Science Simulation Singleplayer Space Space Sim Strategy Survival |
 | Starpoint Gemini 2 | 3,006 | Sept. 26, 2014 | 3D Action Atmospheric Destruction Flight Futuristic Indie Moddable Open World RPG Sci-fi Science Simulation Singleplayer Space Space Sim Spaceships Tactical RPG Third Person Trading |
 | Star Trek: Infinite | 2,961 | 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 |
 | Mars First Logistics | 2,961 | 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 |
 | Juno: New Origins | 2,861 | 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 |
 | Terraformers | 2,852 | March 9, 2023 | Atmospheric Board Game Card Game Choices Matter Exploration Futuristic Management Mars Nonlinear Procedural Generation Resource Management Roguelike Sci-fi Science Simulation Singleplayer Space Survival Turn-Based Turn-Based Strategy |
 | TRYP FPV | 2,813 | June 30, 2022 | 3D 6DOF Asynchronous Multiplayer Controller Early Access Education Exploration First-Person Flight Immersive Sim Indie Open World Physics Racing Realistic Science Simulation Singleplayer Sports eSports |
 | Expeditions: A MudRunner Game | 2,715 | March 5, 2024 | Automobile Sim Base Building Building Character Customization Co-op Driving Exploration Moddable Multiplayer Nature Offroad Online Co-Op Open World Physics Racing Realistic Science Simulation Singleplayer Transportation |
 | Mars Horizon | 2,708 | 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 |
 | ΔV: Rings of Saturn | 2,619 | July 21, 2023 | 2D Action Atmospheric Casual Difficult Exploration Immersive Sim Open World Physics Procedural Generation Realistic Sandbox Sci-fi Science Simulation Singleplayer Space Space Sim Top-Down Vehicular Combat |
 | SpaceChem | 2,583 | March 2, 2011 | 2D Addictive Automation Building Casual Difficult Education Great Soundtrack Illuminati Indie Logic Programming Puzzle Sci-fi Science Simulation Singleplayer Space Strategy Touch-Friendly |
 | Storm Chasers | 2,579 | June 28, 2019 | Action Atmospheric Destruction Driving Early Access First-Person Indie Multiplayer Open World Physics Realistic Science Simulation Singleplayer |
 | Suicide Guy | 2,447 | July 14, 2017 | 3D Platformer Action Adventure Atmospheric Classic Comedy Dark Humor FPS Female Protagonist First-Person Funny Indie Physics Platformer Puzzle Puzzle Platformer Sci-fi Science Singleplayer Story Rich |
 | CATO: Buttered Cat | 2,404 | Sept. 5, 2024 | 2D Platformer Adventure Cartoon Cats Controller Cute Fantasy Funny Hidden Object Indie Local Co-Op Local Multiplayer Multiplayer Physics Pixel Graphics Platformer Puzzle Puzzle Platformer Science Singleplayer |
 | OUTBRK | 2,325 | June 28, 2024 | 3D Action Action-Adventure Adventure Atmospheric Casual Destruction Early Access Exploration First-Person Immersive Sim Indie Multiplayer Nature Open World Realistic Science Simulation Singleplayer Strategy |
 | OUTBRK Playtest | 2,295 | May 15, 2024 | 3D Action Action-Adventure Adventure Atmospheric Casual Destruction Early Access Exploration First-Person Immersive Sim Indie Multiplayer Nature Open World Realistic Science Simulation Singleplayer Strategy |
 | The Powder Toy | 2,286 | June 14, 2024 | 2D Building Classic Destruction Education Electronic Free to Play Moddable Physics Pixel Graphics Realistic Sandbox Science Simulation Singleplayer |
 | Slipways | 2,159 | June 3, 2021 | 4X Building Economy Family Friendly Futuristic Indie Management Procedural Generation Puzzle Relaxing Resource Management Sandbox Sci-fi Science Singleplayer Space Strategy Trading Turn-Based Turn-Based Strategy |
 | Moons of Madness | 2,121 | Oct. 22, 2019 | Adventure Alternate History Atmospheric Exploration First-Person Horror Indie Lovecraftian Mars Mystery Psychological Psychological Horror Puzzle Sci-fi Science Singleplayer Space Survival Thriller Walking Simulator |
 | Star Birds | 2,074 | Sept. 10, 2025 | 3D Automation Base Building Building Casual City Builder Collectathon Colorful Crafting Early Access Management Minimalist Relaxing Resource Management Roguelite Science Simulation Space Strategy Stylized |
 | Beecarbonize | 2,060 | Aug. 1, 2023 | 2D Capitalism Card Game Choices Matter Economy Free to Play Management Multiple Endings Nature Nonlinear Political Political Sim Resource Management Roguelike Roguelite Science Simulation Singleplayer Strategy Survival |
 | Flyout | 1,899 | Nov. 17, 2023 | 3D Building Early Access Flight Immersive Sim Indie Jet Military Physics Procedural Generation Psychological Horror Realistic Sandbox Science Simulation Singleplayer |
 | Take On Mars | 1,740 | 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 |
 | Quantum Conundrum | 1,719 | June 21, 2012 | 3D Platformer Adventure Cartoony Casual Comedy Controller Difficult Family Friendly First-Person Funny Physics Platformer Puzzle Puzzle Platformer Sci-fi Science Singleplayer Strategy Time Manipulation |
 | The Sapling | 1,673 | Dec. 12, 2019 | Aliens Artificial Intelligence Atmospheric Casual Dinosaurs Early Access Education God Game Indie Life Sim Nature Open World Procedural Generation Relaxing Sandbox Science Short Simulation Singleplayer Survival |
 | Genesis Alpha One Deluxe Edition | 1,516 | Feb. 25, 2020 | 3D Action Roguelike Base Building Building FPS First-Person Horror Management Multiple Endings Open World Post-apocalyptic Procedural Generation Roguelike Roguelite Sci-fi Science Space Space Sim Survival Survival Horror |
 | InfraSpace | 1,510 | Sept. 22, 2023 | Automation Base Building Building Capitalism City Builder Crafting Economy Management Moddable Modern Resource Management Sandbox Sci-fi Science Simulation Singleplayer Space Strategy Trains Transportation |
 | South Scrimshaw Part One | 1,504 | June 9, 2023 | 2D Aliens Alternate History Atmospheric Casual Cinematic Emotional Experimental Hand-drawn Linear Lore-Rich Nature Sci-fi Science Singleplayer Space Story Rich Submarine Underwater Visual Novel |
 | CHAOS;HEAD NOAH | 1,492 | Oct. 7, 2022 | 2D Adventure Anime Atmospheric Choices Matter Gore Great Soundtrack Horror Mystery Psychological Horror Romance Sci-fi Science Sexual Content Singleplayer Story Rich Violent Visual Novel |
 | STEINS;GATE ELITE | 1,492 | Feb. 19, 2019 | Adventure Anime Choices Matter Comedy Drama Gore Great Soundtrack Multiple Endings Mystery Psychological Horror Remake Romance Sci-fi Science Singleplayer Story Rich Thriller Time Travel Violent Visual Novel |
 | Thrive | 1,466 | Nov. 26, 2021 | 2D 3D 3D Vision Artificial Intelligence Casual Character Customization Early Access Education Family Friendly Hex Grid Management Nature Procedural Generation Realistic Sandbox Science Simulation Survival Top-Down Tutorial |
 | WolfQuest: Classic | 1,388 | July 22, 2025 | 3D Action Action RPG Action-Adventure Co-op Education Exploration Family Friendly Hunting Immersive Sim Life Sim Multiplayer Nature PvE RPG Realistic Science Simulation Singleplayer Survival |
 | The Light Remake | 1,375 | June 4, 2020 | Atmospheric FMV First-Person Horror Logic Multiple Endings Mystery Dungeon Philosophical Post-apocalyptic Psychedelic Psychological Horror Puzzle Realistic Sci-fi Science Simulation Surreal Survival Horror Walking Simulator Wargame |
 | Boson X | 1,318 | Sept. 15, 2014 | 3D Platformer Action Arcade Colorful Difficult Fast-Paced Female Protagonist Indie Minimalist Parkour Platformer Precision Platformer Psychedelic Runner Sci-fi Science Singleplayer Stylized Third Person Unforgiving |
 | Sand:box | 1,233 | Nov. 24, 2023 | 2D Automation Building Casual Colorful Crafting Destruction Education Electronic Indie Logic Old School Physics Pixel Graphics Relaxing Sandbox Science Simulation Singleplayer Stylized |
 | Mega Man Battle Network Legacy Collection Vol. 1 | 1,185 | April 13, 2023 | 2D Action Action RPG Anime Classic Deckbuilding JRPG Pixel Graphics PvE PvP RPG Retro Sci-fi Science Singleplayer Strategy Trading |
 | Reentry - A Space Flight Simulator | 1,098 | 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 |
 | STEINS;GATE: Linear Bounded Phenogram | 1,089 | Feb. 19, 2019 | Adventure Anime Great Soundtrack Sci-fi Science Singleplayer Story Rich Time Travel Visual Novel |
 | Little Rocket Lab Playtest | 1,080 | March 6, 2025 | 2D Adventure Automation Building Colorful Crafting Cute Exploration Female Protagonist Life Sim Logic Pixel Graphics RPG Relaxing Sandbox Science Simulation Singleplayer Story Rich Strategy RPG |
 | Machinika Museum | 1,070 | March 23, 2021 | 3D Adventure Aliens Atmospheric First-Person Futuristic Hidden Object Indie Investigation Logic Mystery Narration Physics Point & Click Puzzle Sci-fi Science Short Singleplayer Story Rich |
 | Little Rocket Lab | 1,070 | Oct. 7, 2025 | 2D Adventure Automation Building Colorful Crafting Cute Exploration Female Protagonist Life Sim Logic Pixel Graphics RPG Relaxing Sandbox Science Simulation Singleplayer Story Rich Strategy RPG |
 | DEPLOYMENT | 1,024 | April 10, 2018 | 3D Platformer Action Adventure Atmospheric Battle Royale Casual Comedy Dark Humor Funny Massively Multiplayer Multiplayer Platformer Puzzle Puzzle Platformer Racing Sci-fi Science Singleplayer Strategy Stylized |
 | METAL EDEN | 1,006 | Sept. 2, 2025 | 3D Action Adventure Artificial Intelligence Boomer Shooter Combat Cyberpunk FPS Female Protagonist First-Person Gore PvE Realistic Robots Sci-fi Science Shooter Singleplayer Surreal Violent |
 | Tin Can | 998 | May 12, 2022 | 3D Atmospheric Early Access First-Person Immersive Sim Indie Management Physics Puzzle Realistic Resource Management Sci-fi Science Simulation Singleplayer Space Space Sim Strategy Survival Survival Horror |
 | Beyond Blue | 992 | June 11, 2020 | Adventure Atmospheric Casual Education Epic Exploration Female Protagonist Great Soundtrack Indie Nature Open World Psychological Horror Relaxing Science Simulation Singleplayer Story Rich Third Person Underwater Walking Simulator |
 | Incremental Cubes | 990 | Nov. 3, 2021 | 2D Artificial Intelligence Auto Battler Clicker Collectathon Free to Play Idler RPG Retro Science Simulation Singleplayer Time Management |
 | Main Assembly | 982 | Jan. 26, 2021 | 3D Artificial Intelligence Automation Building Character Customization Co-op Crafting Education Immersive Sim Logic Management Multiplayer Online Co-Op Physics Programming Robots Sandbox Science Simulation Singleplayer |
 | Signal Simulator | 951 | April 29, 2018 | Aliens Atmospheric First-Person Horror Indie Psychological Horror Sandbox Science Simulation Singleplayer Space |
 | Species: Artificial Life, Real Evolution | 948 | Sept. 28, 2018 | Early Access Education Experimental God Game Indie Management Nature Open World Psychological Horror Real-Time Real-Time with Pause Realistic Relaxing Sandbox Science Simulation Singleplayer Strategy |
 | Nucleares | 895 | March 13, 2023 | 3D Action Artificial Intelligence Experimental FPS First-Person Immersive Sim Indie Investigation Logic Modern Realistic Resource Management Robots Sci-fi Science Simulation Singleplayer Strategy Walking Simulator |
 | Children of a Dead Earth | 859 | Sept. 23, 2016 | Difficult Indie Physics Realistic Sandbox Sci-fi Science Simulation Singleplayer Space Space Sim Strategy |
 | Q.U.B.E: Director's Cut | 851 | May 21, 2014 | 3D Action Adventure Atmospheric Classic Difficult First-Person Indie Physics Platformer Puzzle Puzzle Platformer Sci-fi Science Singleplayer Soundtrack Space Strategy VR |
 | Tesla vs Lovecraft | 843 | Jan. 26, 2018 | Action Arena Shooter Atmospheric Destruction Futuristic Horror Indie Local Co-Op Local Multiplayer Lovecraftian Mechs RPG Sci-fi Science Shoot 'Em Up Shooter Singleplayer Top-Down Top-Down Shooter Twin Stick Shooter |
 | Nexus 5X | 840 | April 18, 2024 | 3D 4X Board Game Co-op Diplomacy Exploration Management Multiplayer PvP Sci-fi Science Simulation Singleplayer Space Strategy Tabletop Team-Based Turn-Based Combat Turn-Based Strategy Turn-Based Tactics |
 | Stellaris Nexus Playtest | 840 | Dec. 5, 2023 | 3D 4X Board Game Co-op Diplomacy Exploration Management Multiplayer PvP Sci-fi Science Simulation Singleplayer Space Strategy Tabletop Team-Based Turn-Based Combat Turn-Based Strategy Turn-Based Tactics |
 | Homebrew - Patent Unknown | 830 | Nov. 14, 2014 | Automobile Sim Building Crafting Design & Illustration Driving Early Access Education First-Person Game Development Physics Programming PvP Racing Robots Sandbox Science Simulation Space Transportation Utilities |
 | My Furry Protogen | 820 | Aug. 11, 2023 | Action Adventure Atmospheric Casual Cute Cyberpunk Dating Sim Drama Funny Psychological Horror Relaxing Robots Romance Sci-fi Science Sexual Content Singleplayer Space Story Rich Visual Novel |