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Best Sci-fi Games

Top 50 of 1,254 qualifying games — tagged Sci-fi (community voting), 1,000+ reviews · ranked by Wilson lower bound on Steam review score · review data as of 2026-10-22. Under each game: what its Steam reviewers most often mention (+ praise, − complaint), with how many of about 100 most-helpful reviews raise it — from the review consensus on each game's page.

1 MAHOUTEQ! (2025) Adventure · Visual Novel · 2D · $1.99 + funny, charming visual-novel stories 60+ charming expressive MS Paint art 33− short one-to-two-hour experience 24 99.5%1,529 reviews 2 Portal 2 (2011) Platformer · Puzzle · First-Person · $9.99 + creative, satisfying portal-based puzzles 56+ witty writing and memorable characters 53 98.7%468,800 reviews 3 of the Devil (2025) Visual Novel · Female Protagonist · Cyberpunk · Free + Compelling cyberpunk writing 69+ Poker courtroom deduction systems 35 99.0%2,691 reviews 4 Picayune Dreams (2023) Bullet Hell · Psychedelic · Action Roguelike · $4.99 + bullet hell survivor gameplay 53+ breakcore soundtrack and music 30 98.9%4,664 reviews 5 买个可乐饼吧！ - Buy a Croquette! (2024) RPGMaker · Mystery · Sci-fi · Free + Layered branching mystery story 24+ Exceptional quality for free 19− No English translation 8 98.8%8,634 reviews 6 Portal (2007) Puzzle · Puzzle-Platformer · First-Person · $9.99 + inventive portal physics puzzles 82+ GLaDOS humor and memorable endings 35− overly short campaign 17 98.5%200,754 reviews 7 planetarian HD (2017) Visual Novel · Anime · Casual · $9.99 98.8%3,471 reviews 8 South Scrimshaw, Part One (2023) Sci-fi · Linear · Hand-drawn · Free 99.0%1,621 reviews 9 Half-Life: Alyx (2020) VR · FPS · Story Rich · $59.99 + immersive physics-driven environmental interactivity 51+ detailed visuals, environments and lighting 30− stuttering and disruptive loading lag 8 98.3%105,515 reviews 10 Linelith (2022) Casual · Puzzle · Strategy · $2.99 + clever line-drawing puzzles 81+ short, focused puzzle experience 34− very limited puzzle content 18 98.7%1,502 reviews 11 Z.A.T.O. // I Love the World and Everything In It (2025) Visual Novel · Philosophical · Mystery · Free + emotionally resonant narrative 74+ distinctive beautiful art style 31− confusing or unsatisfying ending 8 98.1%13,348 reviews 12 Just a To the Moon Series Beach Episode (2024) Story Rich · Adventure · Emotional · $7.99 + Emotionally devastating series finale 51+ Fun, lingering exploration-focused gameplay 6 98.3%3,976 reviews 13 Katana ZERO (2019) Pixel Graphics · Action · Great Soundtrack · $14.99 + fast, strategic one-hit combat 44+ deep, stylish, emotionally engaging story 39− years-long wait for promised DLC 11 97.9%76,184 reviews 14 RimWorld (2018) Colony Sim · Base-Building · Survival · $34.99 + deep flexible colony simulation 65+ endless varied modded playthroughs 32− steep confusing learning curve 11 97.9%248,585 reviews 15 Control, I'm Not Coming Back (2026) Story Rich · Walking Simulator · Philosophical · Free + Hopeful, emotionally powerful narrative 55+ Brief emotional experience 28 98.1%7,183 reviews 16 Loddlenaut (2023) Underwater · Relaxing · Open World · $19.99 + addictive cleanup loop 89+ adorable creatures and charming visuals 53− game too short for value 24 98.0%6,307 reviews 17 STAR WARS Empire at War - Gold Pack (2010) Strategy · RTS · Space · $19.99 + excellent space combat and strategy 85+ mods add vast lasting variety 49− weak ground combat and unit AI 16 97.7%43,355 reviews 18 Gravitas (2019) Free to Play · Puzzle · Puzzle-Platformer · Free + fun and engaging puzzle design 49+ witty humor and quirky characters 19− content too brief 34 97.9%7,141 reviews 19 Half-Life 2 (2004) FPS · Action · Sci-fi · $9.99 + fun physics-driven shooter gameplay 74+ immersive storytelling and memorable characters 36− dated, repetitive, or clunky gameplay 6 97.6%281,021 reviews 20 Zortch (2023) FPS · Shooter · Action · $4.99 + Fast, varied retro shooting 39+ Exceptional value at five dollars 15 98.3%1,401 reviews 21 Aliya: Timelink (2024) RPG · Interactive Fiction · Visual Novel · $2.99 + Deep emotional and heart-breaking impact 41+ Innovative real-time mechanic creates immersion 26− Waiting and repetition feel tedious 6 97.7%9,692 reviews 22 Don't Escape: 4 Days to Survive (2019) Adventure · Pixel Graphics · Point & Click · $14.99 + Time management and logical puzzles 44+ Gripping, emotional post-apocalypse story 36 97.9%2,825 reviews 23 Dyson Sphere Program (2021) Automation · Space · Base-Building · $19.99 + addictive interstellar factory automation 83+ hundreds of hours of content 10− steep, poorly explained learning curve 10 97.4%91,825 reviews 24 Gunpoint (2013) Stealth · Indie · Puzzle · $9.99 + clever puzzles with multiple solutions 81+ witty dialogue and dark humor 30− too short despite solid quality 18 97.5%13,332 reviews 25 Satisfactory (2024) Base-Building · Automation · Open World · $39.99 + addictive, flexible factory building 88+ satisfying, well-paced unlock progression 9− tedious or limited mechanics 7 97.3%279,969 reviews 26 Stray (2022) Cats · Adventure · Atmospheric · $29.99 + satisfying cat exploration and puzzles 59+ detailed neon cyberpunk atmosphere 55− too-short adventure needing more 14 97.2%178,698 reviews 27 VA-11 Hall-A: Cyberpunk Bartender Action (2016) Cyberpunk · Visual Novel · Pixel Graphics · $14.99 + lovable characters and immersive worldbuilding 50+ fantastic immersive soundtrack 19− juvenile, cringeworthy character dialogue 6 97.3%38,762 reviews 28 ARMORED HEAD (2020) Arena Shooter · FPS · Action · $2.49 98.0%1,293 reviews 29 SANABI (2023) Pixel Graphics · Story Rich · Action · $14.99 + emotional tear-jerking narrative 54+ smooth grappling-hook platforming 42− overlong cutscenes and dialogue 10 97.2%45,285 reviews 30 Deep Rock Galactic (2020) Dwarf · Co-op · PvE · $8.99 + satisfying combat and class variety 58+ excellent co-op teamwork and solo scaling 42− slow unlocks and lost rewards 5 97.1%380,387 reviews 31 The Drifter (2025) Point & Click · Pixel Graphics · Story Rich · $19.99 + engaging, well-written narrative 59+ excellent voice acting 30− frustrating backtracking and logic 17 97.5%5,002 reviews 32 Subnautica (2018) Open World Survival Craft · Survival · Horror · $7.49 + rewarding underwater exploration and base-building 88+ beautiful alien biomes and creatures 22− unclear direction and early confusion 6 97.1%382,144 reviews 33 Half-Life 2: Episode Two (2007) FPS · Action · Sci-fi · $19.99 + fun combat, puzzles, and driving 11+ compelling continuation and richer characters 10− achievement hassles and failed saves 5 97.1%41,174 reviews 34 I MAED A GAM3 W1TH Z0MB1ES 1N IT!!!1 (2021) Zombies · Twin Stick Shooter · Top-Down Shooter · Free + Memorable soundtrack and music 9+ Exceptional value for minimal price 7 97.7%1,845 reviews 35 Is the Vat Utopia or Dystopia? (2026) Visual Novel · Dark Comedy · Dystopian · $2.69 97.9%1,119 reviews 36 Lethal Company (2023) Online Co-Op · Horror · First-Person · $9.99 + fun scavenging horror mechanics 82+ chaotic cooperative play with friends 56− steep punishing learning curve 5 97.0%511,105 reviews 37 STEINS;GATE (2016) Visual Novel · Story Rich · Anime · $29.99 + masterclass emotional time-travel narrative 45+ worth full price always 5− slow start and true-ending locks 5 97.1%27,143 reviews 38 planetarian ~the reverie of a little planet~ (2014) Visual Novel · Anime · Post-apocalyptic · Free + emotional post-apocalyptic narrative 51+ short two-to-five-hour runtime 22− cloying, underdeveloped emotional writing 8 97.6%2,028 reviews 39 Split Fiction (2025) Co-op · Split Screen · Female Protagonist · $49.99 + creative, constantly varied mechanics 62+ exceptional two-player co-op experience 52− bland, superficial story and dialogue 13 96.9%127,472 reviews 40 Unsorted Horror (2023) Psychological Horror · Atmospheric · Simulation · Free + Brief games suit short evening sessions 32+ Atmospheric retro-industrial visual style 27− Episodes feel too short 9 97.3%3,718 reviews 41 VHOLUME (2026) Parkour · Atmospheric · First-Person · $8.00 + Fluid parkour movement 77+ Brutalist surreal environments 53− Linear level paths 10 97.3%3,857 reviews 42 Oxygen Not Included (2019) Colony Sim · Base-Building · Survival · $24.99 + deep interlocking colony systems 79+ rewarding steep learning curve 34− overwhelming complexity requiring tutorials 16 96.7%144,000 reviews 43 LEGO Star Wars - The Complete Saga (2009) LEGO · Local Co-Op · Adventure · $19.99 + fun, solid level-based gameplay 17+ enduring appeal across repeat playthroughs 5− frustrating collectibles and missing achievements 7 96.7%25,603 reviews 44 DOOM + DOOM II (2007) FPS · Classic · 1990's · $9.99 + timeless fast-paced demon-blasting gameplay 65+ extensive WAD and mod support 17− tedious and confusing level design 10 96.7%29,304 reviews 45 Half-Life (1998) FPS · Classic · 1990's · $9.99 + timeless, enjoyable FPS gameplay 90+ immersive environmental storytelling and characters 20− frustrating difficulty and confusing puzzles 17 96.5%165,009 reviews 46 Spaceflight Simulator (2022) Sandbox · Space Sim · Space · $9.89 + Fun, creative, engaging sandbox building 95+ Easy to learn, hard to master 32− Price too high or expensive 5 96.8%9,808 reviews 47 Supreme Commander: Forged Alliance (2011) Strategy · RTS · Sci-fi · $12.99 + Large-scale strategy with low action requirements 36+ Longevity through depth and active modding 11− Frequent freezing and crashing issues 7 96.7%14,437 reviews 48 SIGNALIS (2022) Survival Horror · Psychological Horror · Female Protagonist · $19.99 + deep, emotional, mysterious narrative 62+ engaging combat and puzzles 48− tedious backtracking and uneven combat 8 96.6%34,727 reviews 49 Day of the Tentacle Remastered (2016) Point & Click · Adventure · Classic · $14.99 + Funny, witty writing and dialogue 23+ Excellent remaster preserving original charm 22− Puzzle solutions unintuitive and convoluted 5 96.9%4,731 reviews 50 PRAGMATA (2026) Cute · Sci-fi · Action · $59.99 + Hacking and shooting combat 60+ Hugh and Diana’s bond 59− Basic predictable storytelling 11 96.5%54,892 reviews