| Name | | Reviews | Release Date | Tags |
 | Among Us | 639,675 | Nov. 16, 2018 | 2D Action Aliens Cartoony Casual Colorful Co-op Funny Local Multiplayer Minigames Multiplayer Online Co-Op Party Game Psychological PvP Sci-fi Social Deduction Space Survival Top-Down |
 | Lethal Company | 407,328 | Oct. 23, 2023 | Action Action-Adventure Adventure Aliens Atmospheric Co-op Dungeon Crawler Early Access Exploration First-Person Funny Horror Online Co-Op Perma Death Procedural Generation Psychological Horror PvE Sci-fi Survival Horror Time Management |
 | Subnautica | 314,076 | Jan. 23, 2018 | Action Adventure Aliens Atmospheric Base Building Crafting Exploration First-Person Horror Indie Multiplayer Open World Open World Survival Craft Sandbox Sci-fi Singleplayer Survival Survival Horror Underwater VR |
 | Halo: The Master Chief Collection | 233,950 | Dec. 3, 2019 | Action Adventure Aliens Atmospheric Beautiful Classic Co-op Epic First-Person FPS Great Soundtrack Horror Lore-Rich Multiplayer Online Co-Op Sci-fi Shooter Singleplayer Space Story Rich |
 | Half-Life 2 | 196,430 | Nov. 16, 2004 | Action Adventure Aliens Atmospheric Classic Dystopian First-Person FPS Great Soundtrack Horror Moddable Multiplayer Physics Puzzle Sci-fi Shooter Silent Protagonist Singleplayer Story Rich Zombies |
 | Halo Infinite | 179,934 | Nov. 15, 2021 | Action Adventure Aliens Atmospheric Cinematic Competitive Co-op First-Person FPS Free to Play Lore-Rich Multiplayer Open World PvP Sci-fi Shooter Singleplayer Soundtrack Space Story Rich |
 | Black Mesa | 131,772 | March 6, 2020 | Action Adventure Aliens Atmospheric Classic Early Access First-Person FPS Gore Great Soundtrack Horror Indie Mod Multiplayer Remake Sci-fi Shooter Singleplayer Story Rich Zombies |
 | Half-Life | 113,709 | Nov. 19, 1998 | 1990's Action Action-Adventure Adventure Aliens Atmospheric Classic Difficult First-Person FPS Gore Moddable Multiplayer PvP Retro Sci-fi Shooter Silent Protagonist Singleplayer Story Rich |
 | Subnautica: Below Zero | 94,396 | May 13, 2021 | Action Adventure Aliens Atmospheric Base Building Crafting Exploration First-Person Horror Indie Multiplayer Open World Open World Survival Craft Sandbox Sci-fi Singleplayer Story Rich Survival Survival Horror Underwater |
 | Half-Life: Alyx | 90,797 | March 23, 2020 | Action Adventure Aliens Atmospheric Beautiful Female Protagonist First-Person FPS Futuristic Gore Great Soundtrack Horror Memes Psychological Horror Sci-fi Shooter Singleplayer Story Rich VR Zombies |
 | STAR WARS™ Battlefront™ II | 82,419 | June 11, 2020 | Action Adventure Aliens Character Customization Combat Controller Co-op First-Person FPS Multiplayer Online Co-Op PvP Sci-fi Shooter Singleplayer Space Tactical Third Person Third-Person Shooter Vehicular Combat |
 | SPORE™ | 64,949 | Dec. 19, 2008 | Adventure Aliens Cartoon Cartoony Casual Colony Sim Colorful Comedy Cute Exploration Family Friendly Funny God Game Open World Resource Management Sandbox Science Sci-fi Simulation Space |
 | The Planet Crafter | 63,688 | April 10, 2024 | Adventure Aliens Automation Base Building Building Co-op Crafting Exploration First-Person Immersive Sim Online Co-Op Open World Open World Survival Craft Resource Management Sandbox Sci-fi Singleplayer Space Story Rich Survival |
 | Saints Row IV: Re-Elected | 57,379 | Aug. 19, 2013 | Action Adventure Aliens Character Customization Comedy Co-op Dark Humor Female Protagonist Funny Great Soundtrack Multiplayer Online Co-Op Open World Parody Sandbox Sci-fi Singleplayer Superhero Third Person Third-Person Shooter |
 | Dead Space | 56,455 | Jan. 27, 2023 | Action Action-Adventure Adventure Aliens Atmospheric Blood Combat Dark Horror Psychological Horror Remake Sci-fi Shooter Singleplayer Space Survival Survival Horror Third Person Third-Person Shooter Violent |
 | Alien: Isolation | 46,900 | Oct. 6, 2014 | Action Adventure Aliens Atmospheric Difficult Female Protagonist First-Person FPS Gore Great Soundtrack Horror Psychological Horror Sci-fi Shooter Singleplayer Space Stealth Survival Survival Horror VR |
 | Deep Rock Galactic: Survivor | 44,767 | Sept. 17, 2025 | Action Action Roguelike Aliens Arcade Arena Shooter Atmospheric Bullet Hell Combat Dark Dwarf Procedural Generation PvE Roguelike Roguelite Sci-fi Score Attack Singleplayer Space Top-Down Top-Down Shooter |
 | Deep Rock Galactic: Survivor Playtest | 44,756 | June 2, 2023 | Action Action Roguelike Aliens Arcade Arena Shooter Atmospheric Bullet Hell Combat Dark Dwarf Procedural Generation PvE Roguelike Roguelite Sci-fi Score Attack Singleplayer Space Top-Down Top-Down Shooter |
 | XCOM: Enemy Unknown | 39,860 | Oct. 8, 2012 | Action Addictive Aliens Atmospheric Base Building Character Customization Difficult Futuristic Multiplayer Perma Death Replay Value RPG Sci-fi Singleplayer Strategy Tactical Turn-Based Turn-Based Strategy Turn-Based Tactics Unforgiving |
 | Abiotic Factor | 38,131 | July 22, 2025 | Adventure Aliens Base Building Building Co-op Campaign Crafting Early Access Exploration First-Person FPS Immersive Sim Multiplayer Online Co-Op Open World Survival Craft PvE Sandbox Science Sci-fi Simulation Survival |
 | Prey | 36,828 | May 4, 2017 | Action Adventure Aliens Atmospheric Exploration First-Person FPS Futuristic Great Soundtrack Horror Immersive Sim Open World Psychological Horror RPG Sci-fi Singleplayer Space Stealth Story Rich Survival Horror |
 | Marvel's Guardians of the Galaxy | 34,278 | Oct. 26, 2021 | Action Action-Adventure Adventure Aliens Atmospheric Choices Matter Cinematic Comedy Exploration Great Soundtrack Multiplayer Open World RPG Sci-fi Shooter Singleplayer Space Story Rich Superhero Third-Person Shooter |
 | Half-Life 2: Episode Two | 33,917 | Oct. 10, 2007 | Action Adventure Aliens Atmospheric Classic Dystopian Episodic First-Person FPS Great Soundtrack Horror Multiplayer Post-apocalyptic Puzzle Sci-fi Shooter Silent Protagonist Singleplayer Story Rich Zombies |
 | Starship Troopers: Extermination Playtest | 29,293 | March 26, 2024 | 3D Action Aliens Arcade Arena Shooter Base Building Class-Based Combat Co-op First-Person FPS Multiplayer Online Co-Op PvE Realistic Sci-fi Shooter Singleplayer Space Wargame |
 | Starship Troopers: Extermination | 29,292 | Oct. 10, 2024 | 3D Action Aliens Arcade Arena Shooter Base Building Class-Based Combat Co-op First-Person FPS Multiplayer Online Co-Op PvE Realistic Sci-fi Shooter Singleplayer Space Wargame |
 | Abiotic Factor Playtest | 29,158 | Dec. 12, 2023 | Adventure Aliens Base Building Building Co-op Campaign Crafting Early Access Exploration First-Person FPS Immersive Sim Multiplayer Online Co-Op Open World Survival Craft PvE Sandbox Science Sci-fi Simulation Survival |
 | Half-Life 2: Episode One | 25,914 | June 1, 2006 | Action Adventure Aliens Atmospheric Cinematic Classic Dystopian Episodic First-Person FPS Great Soundtrack Moddable Puzzle Sci-fi Shooter Short Silent Protagonist Singleplayer Story Rich Zombies |
 | Dead Space™ 2 | 24,563 | Jan. 25, 2011 | Action Adventure Aliens Atmospheric Blood Combat Co-op Futuristic Gore Horror Multiplayer Sci-fi Shooter Singleplayer Space Story Rich Survival Survival Horror Third Person Third-Person Shooter |
 | Half-Life: Opposing Force | 24,427 | Nov. 1, 1999 | 1990's Action Adventure Aliens Atmospheric Classic Co-op First-Person FPS Gore Great Soundtrack Military Moddable Puzzle Retro Sci-fi Shooter Silent Protagonist Singleplayer Story Rich |
 | Alien Swarm: Reactive Drop | 23,482 | April 20, 2017 | Aliens Class-Based Combat Co-op First-Person Hacking Level Editor Moddable Procedural Generation PvE PvP Sci-fi Shooter Tactical Third Person Third-Person Shooter Top-Down Top-Down Shooter Twin Stick Shooter Zombies |
 | Dead Space (2008) | 22,428 | Jan. 9, 2009 | Action Adventure Aliens Atmospheric Dark Futuristic Gore Horror Immersive Sci-fi Shooter Silent Protagonist Singleplayer Space Story Rich Survival Survival Horror Third Person Third-Person Shooter Zombies |
 | Serious Sam 3: BFE | 21,530 | Nov. 22, 2011 | Action Adventure Aliens Comedy Co-op Difficult First-Person FPS Funny Gore Indie Local Co-Op Local Multiplayer Multiplayer Old School Online Co-Op Sci-fi Shooter Singleplayer Split Screen |
 | Alien Swarm | 21,515 | July 19, 2010 | Action Adventure Aliens Class-Based Co-op Free to Play Moddable Multiplayer Online Co-Op PvE Sci-fi Shooter Singleplayer Strategy Survival Team-Based Third Person Third-Person Shooter Top-Down Top-Down Shooter |
 | Aliens: Fireteam Elite | 21,093 | Aug. 23, 2021 | Action Aliens Atmospheric Character Customization Controller Co-op Co-op Campaign Horror Multiplayer Online Co-Op PvE RPG Sci-fi Shooter Singleplayer Space Survival Survival Horror Third Person Third-Person Shooter |
 | XCOM®: Chimera Squad | 20,420 | April 23, 2020 | Action Aliens Character Customization Female Protagonist Futuristic Multiplayer RPG Sci-fi Singleplayer Strategy Tactical Tactical RPG Turn-Based Turn-Based Combat Turn-Based Strategy Turn-Based Tactics |
 | Half-Life: Blue Shift | 17,934 | June 1, 2001 | 1990's Action Adventure Aliens Atmospheric Classic First-Person FPS Great Soundtrack Moddable Puzzle Retro Sci-fi Shooter Short Silent Protagonist Singleplayer Story Rich Violent Zombies |
 | Aliens vs. Predator™ | 15,737 | Feb. 16, 2010 | Action Adventure Aliens Atmospheric Blood Co-op First-Person FPS Gore Horror Hunting Multiplayer Online Co-Op Sci-fi Shooter Singleplayer Stealth Strategy Survival Survival Horror |
 | Crysis Remastered | 15,667 | Sept. 17, 2021 | Action Adventure Aliens America Atmospheric Cinematic First-Person FPS Futuristic Multiplayer Open World Realistic Sandbox Sci-fi Shooter Singleplayer Stealth Survival Tactical Violent |
 | 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 |
 | Aliens: Dark Descent | 14,557 | June 19, 2023 | 3D Action Action-Adventure Aliens Combat Dark Horror Isometric Real Time Tactics RTS Sci-fi Singleplayer Space Stealth Strategy Survival Tactical Top-Down Top-Down Shooter Violent |
 | Half-Life: Source | 14,479 | June 1, 2004 | 1990's Action Adventure Aliens Atmospheric Classic First-Person FPS Gore Great Soundtrack Horror Moddable Multiplayer Remake Sci-fi Shooter Silent Protagonist Singleplayer Story Rich Zombies |
 | Nuclear Nightmare | 14,354 | Oct. 20, 2024 | Action Action-Adventure Adventure Aliens Atmospheric Co-op Early Access Exploration First-Person Funny Horror Multiplayer Online Co-Op Open World Perma Death Procedural Generation Psychological Horror PvE Sci-fi Survival Horror |
 | Breathedge | 14,141 | Feb. 25, 2021 | Action Action-Adventure Adventure Aliens Atmospheric Base Building Crafting Early Access Exploration First-Person Indie Multiplayer Open World Open World Survival Craft Sandbox Sci-fi Simulation Singleplayer Space Survival |
 | Sid Meier's Civilization®: Beyond Earth™ | 13,924 | Oct. 23, 2014 | 4X Action Adventure Aliens Atmospheric Exploration Futuristic Grand Strategy Hex Grid Moddable Multiplayer Replay Value Sci-fi Simulation Singleplayer Space Strategy Tactical Turn-Based Turn-Based Strategy |
 | Surgeon Simulator | 13,600 | April 19, 2013 | Action Aliens Blood Casual Comedy Dark Dark Humor Difficult First-Person Funny Gore Great Soundtrack Indie Intentionally Awkward Controls Medical Sim Physics Puzzle Simulation Singleplayer VR |
 | Wall World | 10,814 | April 5, 2023 | 2D Action Action-Adventure Aliens Combat Difficult Exploration Management Mechs Mining Pixel Graphics Procedural Generation Resource Management Roguelike Roguelite Sci-fi Side Scroller Singleplayer Strategy Tower Defense |
 | Half-Life 2: Lost Coast | 10,565 | Oct. 27, 2005 | Action Adventure Aliens Atmospheric Benchmark Classic Dystopian First-Person FPS Free to Play Futuristic Great Soundtrack Multiplayer Post-apocalyptic Sci-fi Shooter Short Silent Protagonist Singleplayer Story Rich |
 | Crysis 2 | 9,261 | March 22, 2011 | 3D Vision Action Adventure Aliens Atmospheric Benchmark Cyberpunk First-Person FPS Futuristic Great Soundtrack Multiplayer Open World RPG Sci-fi Shooter Singleplayer Stealth Story Rich Survival |
| Crysis 2 - Maximum Edition | 9,261 | March 22, 2011 | 3D Vision Action Adventure Aliens Atmospheric Benchmark Cyberpunk First-Person FPS Futuristic Great Soundtrack Multiplayer Open World RPG Sci-fi Shooter Singleplayer Stealth Story Rich Survival |
 | EARTH DEFENSE FORCE 5 | 9,238 | July 11, 2019 | Action Aliens Anime Class-Based Co-op Difficult Funny Gore Hack and Slash Local Co-Op Mechs Multiplayer Online Co-Op Sci-fi Shooter Singleplayer Split Screen Third Person Third-Person Shooter Violent |
 | Evolve Stage 2 | 9,145 | Feb. 10, 2015 | Action Aliens Atmospheric Casual Class-Based Co-op First-Person FPS Multiplayer Online Co-Op PvP Sci-fi Shooter Singleplayer Stealth Strategy Survival Tactical Team-Based Third Person |
 | Starship Troopers: Terran Command | 9,028 | June 16, 2022 | Action Aliens Artificial Intelligence Co-op Gore Great Soundtrack Military Real-Time Real Time Tactics Replay Value Resource Management RTS Sci-fi Simulation Singleplayer Strategy Tactical Tower Defense War Wargame |
 | Space Hulk: Deathwing Enhanced Edition | 8,844 | May 22, 2018 | Action Adventure Aliens Atmospheric Co-op First-Person FPS Games Workshop Gore Horror Mature Multiplayer Online Co-Op RPG Sci-fi Shooter Singleplayer Space Violent Warhammer 40K |
 | Destroy All Humans! | 8,813 | July 28, 2020 | Action Adventure Aliens Classic Comedy Cult Classic Dark Humor Destruction Funny Gore Multiplayer Open World Remake Sandbox Sci-fi Singleplayer Third Person Third-Person Shooter Villain Protagonist Violent |
 | Natural Selection 2 | 8,594 | Oct. 30, 2012 | Action Adventure Aliens Atmospheric Competitive Co-op First-Person FPS Futuristic Indie Moddable Multiplayer Online Co-Op RTS Sci-fi Shooter Space Strategy Tactical Team-Based |
| Natural Selection 2 - Deluxe DLC | 8,594 | Oct. 30, 2012 | Action Adventure Aliens Atmospheric Competitive Co-op First-Person FPS Futuristic Indie Moddable Multiplayer Online Co-Op RTS Sci-fi Shooter Space Strategy Tactical Team-Based |
 | Command & Conquer 3 Tiberium Wars™ | 8,531 | Nov. 13, 2009 | Action Action RTS Aliens Atmospheric Base Building City Builder Classic Family Friendly FMV Futuristic Great Soundtrack Level Editor Multiplayer Post-apocalyptic RTS Sci-fi Singleplayer Story Rich Strategy War |
 | Galaxy Life | 8,464 | Aug. 31, 2022 | 2.5D Aliens Base Building Cartoony City Builder Combat Co-op Crafting Funny Inventory Management Isometric Military Pirates PvE PvP Sci-fi Strategy Strategy RPG Tactical Wargame |
 | The Universim | 8,361 | Jan. 22, 2024 | Aliens Building Casual City Builder Colony Sim Colorful Exploration God Game Management Open World Procedural Generation Real-Time with Pause Resource Management Sandbox Sci-fi Simulation Singleplayer Space Strategy Survival |
 | Galactic Civilizations III | 8,318 | May 14, 2015 | 3D 4X Aliens Futuristic Grand Strategy Hex Grid Lore-Rich Moddable Multiplayer Procedural Generation PvE PvP Sandbox Sci-fi Space Strategy Third Person Turn-Based Turn-Based Strategy War |
 | Crysis 2 Remastered | 8,308 | Nov. 17, 2022 | Action Aliens Combat Dark Humor Dystopian First-Person FPS Futuristic Hero Shooter Multiplayer Post-apocalyptic PvE Sandbox Sci-fi Shoot 'Em Up Shooter Singleplayer Stealth Tactical Violent |
 | Halo Wars: Definitive Edition | 8,285 | April 20, 2017 | Action Aliens Atmospheric Base Building Classic Co-op Great Soundtrack Military Multiplayer Online Co-Op RTS Sandbox Sci-fi Shooter Simulation Singleplayer Story Rich Strategy Tactical War |
 | EARTH DEFENSE FORCE 4.1 The Shadow of New Despair | 7,649 | July 18, 2016 | Action Aliens Anime Comedy Co-op Destruction Difficult Funny Gore Local Co-Op Mechs Memes Multiplayer Online Co-Op Robots Sci-fi Shooter Singleplayer Split Screen Third-Person Shooter |
 | Aliens: Colonial Marines Collection | 7,613 | May 1, 2012 | Action Adventure Aliens Atmospheric Character Customization Co-op Female Protagonist First-Person FPS Futuristic Gore Great Soundtrack Horror Multiplayer Online Co-Op Sci-fi Shooter Singleplayer Space Survival |
 | Sanctum 2 | 7,431 | May 15, 2013 | Action Aliens Combat Co-op Female Protagonist First-Person FPS Funny Futuristic Great Soundtrack Indie Multiplayer Online Co-Op RPG Sci-fi Shooter Singleplayer Strategy Survival Tower Defense |
 | Crysis 3 Remastered | 7,114 | Nov. 17, 2022 | Action Aliens Combat Dystopian First-Person FPS Futuristic Hero Shooter Physics Post-apocalyptic PvE Sandbox Sci-fi Shoot 'Em Up Shooter Singleplayer Stealth Story Rich Violent War |
 | Serious Sam HD: The First Encounter | 7,102 | Nov. 24, 2009 | Action Adventure Aliens Classic Colorful Comedy Co-op Difficult First-Person FPS Funny Gore Indie Multiplayer Old School Online Co-Op Remake Sci-fi Shooter Singleplayer |
 | STAR WARS™: Battlefront Classic Collection | 7,091 | March 13, 2024 | 3D Action Aliens Artificial Intelligence Driving First-Person FPS Futuristic Military Old School Retro Robots Sci-fi Shooter Space Split Screen Tactical Third Person Third-Person Shooter War |
 | ENDLESS Space™ - Definitive Edition | 6,590 | July 4, 2012 | 4X Aliens Atmospheric Diplomacy Exploration Futuristic Grand Strategy Great Soundtrack Indie Management Multiplayer Replay Value Sandbox Sci-fi Simulation Singleplayer Space Strategy Turn-Based Turn-Based Strategy |
 | Duke Nukem Forever | 6,221 | June 13, 2011 | Action Adventure Aliens Classic Comedy Dark Humor First-Person FPS Funny Gore Linear Mature Memes Multiplayer Nudity Old School Sci-fi Sexual Content Shooter Singleplayer |
 | Insaniquarium Deluxe | 6,145 | Aug. 30, 2006 | Action Addictive Aliens Casual Classic Clicker Colorful Cute Difficult Family Friendly Funny Great Soundtrack Management Point & Click Psychological Horror Relaxing Simulation Singleplayer Strategy Underwater |
 | The Invincible | 6,104 | Nov. 6, 2023 | Adventure Aliens Choices Matter Conversation Female Protagonist First-Person Futuristic Interactive Fiction Multiple Endings Mystery Narration Nonlinear Robots Science Sci-fi Singleplayer Space Story Rich Thriller Walking Simulator |
 | EARTH DEFENSE FORCE 6 | 6,013 | July 25, 2024 | 3D Action Aliens Anime Co-op Gore Local Co-Op Local Multiplayer Mechs Military Multiplayer Online Co-Op PvE Sci-fi Shooter Singleplayer Third-Person Shooter Violent |
 | Space Hulk: Deathwing | 5,729 | Dec. 14, 2016 | Action Adventure Aliens Atmospheric Co-op First-Person FPS Games Workshop Gore Horror Multiplayer Online Co-Op RPG Sci-fi Shooter Singleplayer Space Strategy Survival Warhammer 40K |
 | Axiom Verge | 5,699 | May 14, 2015 | 2D Action Adventure Aliens Atmospheric Cyberpunk Difficult Exploration Great Soundtrack Horror Indie Metroidvania Pixel Graphics Platformer Retro Sci-fi Shooter Side Scroller Singleplayer Story Rich |
 | Species: Unknown | 5,548 | Oct. 23, 2025 | 3D Action Aliens Atmospheric Early Access Exploration First-Person FPS Horror Indie Investigation Multiplayer Online Co-Op Psychological Horror PvE Realistic Sci-fi Shooter Stealth Survival Horror |
 | Species: Unknown Playtest | 5,513 | June 17, 2025 | 3D Action Aliens Atmospheric Early Access Exploration First-Person FPS Horror Indie Investigation Multiplayer Online Co-Op Psychological Horror PvE Realistic Sci-fi Shooter Stealth Survival Horror |
 | Bit Blaster XL | 5,484 | Jan. 22, 2016 | 2D Action Aliens Arcade Bullet Hell Cartoon Casual Controller Difficult Family Friendly Minimalist Old School Pixel Graphics Retro Sci-fi Score Attack Shoot 'Em Up Shooter Space Survival |
 | Command & Conquer™ 3: Kane’s Wrath | 5,286 | Nov. 13, 2009 | 3D Action Aliens Atmospheric Base Building Building Co-op Difficult Family Friendly FMV Grand Strategy Level Editor Multiplayer Post-apocalyptic RTS Sci-fi Singleplayer Story Rich Strategy War |
 | ROUTINE | 5,237 | Dec. 4, 2025 | 3D Action Adventure Aliens Atmospheric Cinematic Dark Exploration First-Person Horror Psychological Horror Puzzle Sci-fi Singleplayer Space Stealth Story Rich Survival Horror Thriller Walking Simulator |
 | Duke Nukem 3D: 20th Anniversary World Tour | 5,218 | Oct. 11, 2016 | 1990's Action Adventure Aliens Boomer Shooter Classic Comedy Co-op First-Person FPS Funny Gore Great Soundtrack Memes Multiplayer Nudity Remake Retro Shooter Singleplayer |
 | Phoenix Point | 5,176 | Dec. 3, 2020 | 3D Aliens Character Customization First-Person Grand Strategy Horror Isometric Perma Death Post-apocalyptic Procedural Generation PvE RPG Strategy Tactical Tactical RPG Third Person Third-Person Shooter Transhumanism Turn-Based Strategy Tutorial |
 | STAR WARS™ Battlefront | 4,978 | June 11, 2020 | Action Adventure Aliens Combat Co-op First-Person FPS Multiplayer Online Co-Op PvP Sci-fi Shooter Singleplayer Space Split Screen Strategy Third Person Third-Person Shooter Vehicular Combat VR |
 | The Bureau: XCOM Declassified | 4,808 | Aug. 19, 2013 | Action Adventure Aliens Atmospheric Cold War Multiplayer Noir Open World Retro RPG Sci-fi Shooter Singleplayer Stealth Story Rich Strategy Tactical Third Person Third-Person Shooter Turn-Based |
 | 1000xRESIST | 4,774 | May 9, 2024 | 3D Aliens Anime Atmospheric Cinematic Experimental Exploration Female Protagonist Futuristic Multiple Endings Mystery Narrative Post-apocalyptic Psychological Horror Sci-fi Story Rich Surreal Thriller Visual Novel Walking Simulator |
 | Age of Wonders: Planetfall | 4,718 | Aug. 6, 2019 | 4X Aliens Character Customization City Builder Dinosaurs Economy Futuristic Hex Grid Management Multiplayer Perma Death PvP Sci-fi Singleplayer Space Strategy Tactical Turn-Based Turn-Based Strategy War |
 | Crysis® 3 | 4,653 | June 4, 2020 | Action Adventure Aliens Benchmark Co-op First-Person FPS Gore Great Soundtrack Multiplayer Online Co-Op Open World Post-apocalyptic Sci-fi Shooter Singleplayer Stealth Story Rich Strategy Violent |
 | Tower Dominion | 4,556 | May 7, 2025 | 3D Aliens Auto Battler Base Building Building Choices Matter Class-Based Isometric Military Procedural Generation Resource Management Roguelike Roguelite RTS Sci-fi Singleplayer Strategy Tactical Tower Defense War |
 | Tower Dominion Playtest | 4,555 | Dec. 13, 2024 | 3D Aliens Auto Battler Base Building Building Choices Matter Class-Based Isometric Military Procedural Generation Resource Management Roguelike Roguelite RTS Sci-fi Singleplayer Strategy Tactical Tower Defense War |
 | Defense Grid: The Awakening | 4,480 | Dec. 8, 2008 | Action Addictive Adventure Aliens Controller Futuristic Indie Replay Value Sci-fi Singleplayer Strategy Touch-Friendly Tower Defense |
 | Predator: Hunting Grounds | 4,478 | April 29, 2021 | 3D Action Aliens Character Customization Cinematic Combat Controller First-Person FPS Gun Customization Military Multiplayer PvP Realistic Sci-fi Shooter Stealth Survival Tactical Third Person |
 | Silica | 4,320 | May 3, 2023 | 3D Action Aliens Co-op Early Access First-Person FPS Futuristic Indie Multiplayer Online Co-Op Physics PvE PvP RTS Sci-fi Shooter Singleplayer Strategy Vehicular Combat |
 | Halo: Spartan Assault | 4,293 | April 4, 2014 | Action Adventure Aliens Arcade Co-op Futuristic Great Soundtrack Isometric Multiplayer Sci-fi Shooter Singleplayer Space Strategy Third Person Third-Person Shooter Top-Down Top-Down Shooter Touch-Friendly Twin Stick Shooter |
 | Hidden Deep Playtest | 4,183 | Nov. 11, 2021 | 2D 2D Platformer Action Action-Adventure Aliens Co-op Dark Early Access Exploration Horror Mining Multiplayer Mystery Nostalgia Physics Puzzle Sci-fi Shooter Singleplayer Thriller |
 | 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 |
 | Hidden Deep | 4,178 | Jan. 24, 2022 | 2D 2D Platformer Action Action-Adventure Aliens Co-op Dark Early Access Exploration Horror Mining Multiplayer Mystery Nostalgia Physics Puzzle Sci-fi Shooter Singleplayer Thriller |
 | 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 |
 | Unnamed Space Idle | 4,039 | July 27, 2023 | 2D Aliens Artificial Intelligence Auto Battler Automation Casual Clicker Early Access Free to Play Futuristic Idler Resource Management Sci-fi Simulation Singleplayer Space Spaceships Tutorial |
 | ELEX II | 3,912 | March 1, 2022 | Action Action RPG Adventure Aliens Atmospheric Dark Dark Fantasy Dystopian Exploration Fantasy Futuristic Gothic Magic Open World Post-apocalyptic Realistic RPG Singleplayer Story Rich Third Person |
 | Wall World Playtest | 3,818 | Dec. 14, 2022 | 2D Action Action-Adventure Aliens Combat Difficult Exploration Management Mechs Mining Pixel Graphics Procedural Generation Resource Management Roguelike Roguelite Sci-fi Side Scroller Singleplayer Strategy Tower Defense |