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Best Sci-fi Games

Top 50 of 1,108 qualifying games — tagged Sci-fi (community voting), 1,000+ reviews · ranked by Wilson lower bound on Steam review score · review data as of 2026-08-06.

1 Portal 2 (2011) Platformer · Puzzle · First-Person · $9.99 98.7%464,803 reviews 2 Picayune Dreams (2023) Bullet Hell · Psychedelic · Action Roguelike · $4.99 98.9%4,551 reviews 3 买个可乐饼吧！ - Buy a Croquette! (2024) RPGMaker · Mystery · Sci-fi · Free 98.8%8,167 reviews 4 Portal (2007) Puzzle · Puzzle-Platformer · First-Person · $9.99 98.5%197,839 reviews 5 planetarian HD (2017) Visual Novel · Anime · Casual · $9.99 98.9%3,407 reviews 6 Half-Life: Alyx (2020) VR · FPS · Story Rich · $59.99 98.3%104,864 reviews 7 Just a To the Moon Series Beach Episode (2024) Story Rich · Adventure · Emotional · $7.99 98.3%3,944 reviews 8 Linelith (2022) Casual · Puzzle · Strategy · $2.99 98.6%1,428 reviews 9 Katana ZERO (2019) Pixel Graphics · Action · Great Soundtrack · $14.99 97.9%75,739 reviews 10 RimWorld (2018) Colony Sim · Base-Building · Survival · $34.99 97.9%244,121 reviews 11 Loddlenaut (2023) Underwater · Relaxing · Open World · $19.99 98.0%6,092 reviews 12 STAR WARS Empire at War - Gold Pack (2010) Strategy · RTS · Space · $19.99 97.7%42,947 reviews 13 Gravitas (2019) Free to Play · Puzzle · Puzzle-Platformer · Free 97.9%7,113 reviews 14 Half-Life 2 (2004) FPS · Action · Sci-fi · $9.99 97.6%277,331 reviews 15 Zortch (2023) FPS · Shooter · Action · $4.99 98.3%1,378 reviews 16 Aliya: Timelink (2024) RPG · Interactive Fiction · Visual Novel · $2.99 97.7%9,448 reviews 17 Dyson Sphere Program (2021) Automation · Space · Base-Building · $19.99 97.5%91,376 reviews 18 Don't Escape: 4 Days to Survive (2019) Adventure · Pixel Graphics · Point & Click · $14.99 97.9%2,754 reviews 19 Gunpoint (2013) Stealth · Indie · Puzzle · $9.99 97.5%13,316 reviews 20 Satisfactory (2024) Base-Building · Automation · Open World · $39.99 97.3%277,041 reviews 21 ARMORED HEAD (2020) Arena Shooter · FPS · Action · $2.49 98.1%1,288 reviews 22 Stray (2022) Cats · Adventure · Atmospheric · $29.99 97.2%176,402 reviews 23 VA-11 Hall-A: Cyberpunk Bartender Action (2016) Cyberpunk · Visual Novel · Pixel Graphics · $14.99 97.3%38,515 reviews 24 SANABI (2023) Pixel Graphics · Story Rich · Action · $14.99 97.3%44,614 reviews 25 Deep Rock Galactic (2020) Dwarf · Co-op · PvE · $8.99 97.1%378,634 reviews 26 Subnautica (2018) Open World Survival Craft · Survival · Horror · $7.49 97.1%377,886 reviews 27 Half-Life 2: Episode Two (2007) FPS · Action · Sci-fi · $19.99 97.1%41,275 reviews 28 Lethal Company (2023) Online Co-Op · Horror · First-Person · $9.99 97.0%510,077 reviews 29 STEINS;GATE (2016) Visual Novel · Story Rich · Anime · $29.99 97.1%26,514 reviews 30 Split Fiction (2025) Co-op · Split Screen · Female Protagonist · $49.99 97.0%124,817 reviews 31 planetarian ~the reverie of a little planet~ (2014) Visual Novel · Anime · Post-apocalyptic · Free 97.6%2,031 reviews 32 Oxygen Not Included (2019) Colony Sim · Base-Building · Survival · $24.99 96.7%143,081 reviews 33 LEGO Star Wars - The Complete Saga (2009) LEGO · Local Co-Op · Adventure · $19.99 96.7%25,411 reviews 34 Spaceflight Simulator (2022) Sandbox · Space Sim · Space · $9.89 96.8%9,598 reviews 35 Day of the Tentacle Remastered (2016) Point & Click · Adventure · Classic · $14.99 97.0%4,689 reviews 36 Supreme Commander: Forged Alliance (2011) Strategy · RTS · Sci-fi · $12.99 96.7%14,302 reviews 37 DOOM + DOOM II (2007) FPS · Classic · 1990's · $9.99 96.6%28,715 reviews 38 SIGNALIS (2022) Survival Horror · Psychological Horror · Female Protagonist · $19.99 96.6%33,871 reviews 39 Half-Life (1998) FPS · Classic · 1990's · $9.99 96.5%163,229 reviews 40 Universe Sandbox (2015) Sandbox · Space · Simulation · $29.99 96.5%31,869 reviews 41 Detroit: Become Human (2020) Choices Matter · Story Rich · Multiple Endings · $39.99 96.3%257,397 reviews 42 Quake (2007) FPS · Classic · Action · $9.99 96.5%15,667 reviews 43 No Time (2019) Time Travel · Time Manipulation · Sandbox · $12.99 97.0%2,184 reviews 44 Metal Garden (2025) FPS · Atmospheric · Sci-fi · $5.99 96.7%4,208 reviews 45 Unreal Tournament: Game of the Year Edition (2008) Classic · FPS · Action · Free 96.7%4,452 reviews 46 LIZARDS MUST DIE (2023) Historical · Souls-like · Spectacle fighter · $0.79 96.2%26,452 reviews 47 R.E.P.O. (2025) Horror · Online Co-Op · Multiplayer · $6.99 96.0%415,067 reviews 48 STAR WARS Battlefront (Classic, 2004) (2019) Action · Multiplayer · Classic · $9.99 96.5%4,684 reviews 49 Brotato (2023) Rogue-like · Singleplayer · Action Roguelike · $4.99 96.0%117,394 reviews 50 Fallout: New Vegas (2010) Open World · RPG · Post-apocalyptic · $9.99 96.0%260,119 reviews