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Best Moddable Games

Top 50 of 420 qualifying games — tagged Moddable (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 DFHack - Dwarf Fortress Modding Engine (2023) Dwarf · Simulation · Software · Free + Extensive gameplay-improving tools 13+ Bug fixes and workarounds 7 99.4%1,150 reviews 2 People Playground (2019) Sandbox · Gore · Physics · $9.99 + fun creative physics sandbox 83+ workshop mods and endless possibilities 35− crashes and update-broken creations 6 97.8%320,043 reviews 3 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 4 The Powder Toy (2024) Simulation · Sandbox · 2D · Free + Creative, complex sandbox simulation 52+ Free with extensive features 9 98.2%3,086 reviews 5 A Hat in Time (2017) Cute · 3D Platformer · Collectathon · $29.99 + fun polished 3D platforming 56+ charming characters and funny writing 25 97.8%53,609 reviews 6 Mount & Blade: Warband (2010) Medieval · RPG · Open World · $19.99 + fun, distinctive sandbox combat and strategy 47+ endless replayability through extensive mods 29− dated, unimpressive graphics 6 97.7%172,505 reviews 7 Trombone Champ (2022) Rhythm · Comedy · Funny · $14.99 + fun, addictive, and silly 52+ funny trombone and fart sounds 9 97.9%11,263 reviews 8 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 9 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 10 Fractal Block World (2021) Exploration · Open World · FPS · $6.99 + Nested exploration and shrinking 55+ Nearly endless exploration content 13− Mazes, repetition, and convoluted navigation 11 98.3%1,613 reviews 11 Left 4 Dead 2 (2009) Zombies · Co-op · FPS · $9.99 + Engaging cooperative zombie gameplay 56+ Endless replayability through mod support 30− Toxic and unforgiving player base 6 97.5%1,065,990 reviews 12 Factorio (2020) Automation · Base-Building · Resource Management · $35.00 + Addictive, satisfying automation problem-solving 78+ Endless variety from mods and designs 14− Steep, time-consuming learning curve 10 97.5%235,118 reviews 13 Euro Truck Simulator 2 (2012) Driving · Transportation · Simulation · $19.99 + relaxing realistic truck-driving experience 79+ detailed trucks and European landscapes 17− boring or incomplete simulation mechanics 9 97.4%950,402 reviews 14 BeamNG.drive (2015) Simulation · Driving · Physics · $24.99 + realistic physics and sandbox freedom 82+ mods and varied sandbox activities 29− demanding hardware and poor optimization 15 97.2%425,592 reviews 15 Keep Talking and Nobody Explodes (2015) Co-op · Local Multiplayer · Puzzle · $14.99 + Communication puzzle party game 68+ Stressful test of friendship 20− Morse code unreasonably difficult 13 97.3%17,191 reviews 16 IRMÃO Grande & Brasileiro 2 (2021) Simulation · Casual · Party Game · $19.99 97.7%1,504 reviews 17 POSTAL 2 (2012) Violent · Dark Humor · Open World · $9.99 + Freeform chaotic sandbox mayhem 74+ Offensive humor and social commentary 24− Frequent crashes and save errors 5 96.9%139,024 reviews 18 Garry's Mod (2006) Sandbox · Moddable · Multiplayer · $9.99 + Infinite creative possibilities and freedom 80+ Runs surprisingly well on low-end 10− Toxic players abusive admins racism 5 96.9%1,271,229 reviews 19 American Truck Simulator (2016) Automobile Sim · Driving · Open World · $19.99 + relaxing realistic truck driving simulation 79+ beautiful detailed American scenery 21− boring or broken driving systems 9 96.9%198,234 reviews 20 Hot Dogs, Horseshoes & Hand Grenades (2016) Sandbox · VR · Physics · $19.99 + realistic detailed firearm simulation 88+ mods and varied game modes 16− sluggish finicky weapon interactions 5 97.0%23,954 reviews 21 Ravenfield (2017) FPS · War · Singleplayer · $17.99 + Fun customizable sandbox battles 88+ Extensive mods and customization 53− Dumb and janky bot AI 13 96.7%80,214 reviews 22 Fireworks Mania - An Explosive Simulator (2020) Sandbox · Multiplayer · Singleplayer · $14.99 + Fun explosions and sandbox destruction 73+ Excellent mod support available 10 96.9%7,955 reviews 23 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 24 Don't Starve (2013) Survival · Open World Survival Craft · Crafting · $9.99 + fun addictive survival systems 66+ varied runs worth repeated returns 14− harsh deaths and steep learning 14 96.5%113,660 reviews 25 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 26 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 27 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 28 Blade and Sorcery (2024) VR · Swordplay · Moddable · $29.99 + satisfying physics-based VR combat 66+ mods add endless variety 42− lag, stuttering, and loading delays 13 96.5%62,250 reviews 29 Left 4 Dead (2008) Zombies · Co-op · Multiplayer · $9.99 + fun, simple cooperative zombie shooting 70+ excellent co-op with friends 17− campaign redundancy with the sequel 7 96.4%68,597 reviews 30 Counter-Strike: Source (2004) Shooter · FPS · Action · $9.99 + fast, fun classic gunplay 58+ smooth performance on low-end hardware 8− toxic, cheating, dwindling playerbase 8 96.3%193,829 reviews 31 Incredibox (2021) Casual · Rhythm · 2D · $4.99 + fun and creative music composition 45+ good value for the price 5 96.7%5,971 reviews 32 Slice & Dice (2024) Turn-Based Strategy · Rogue-like · Dungeon Crawler · $8.99 + Deep dice-based tactical gameplay 55+ Many modes, builds, and unlocks 32− Unfair luck-driven difficulty 6 96.9%2,582 reviews 33 Quake (2007) FPS · Classic · Action · $9.99 + fast-paced action and satisfying combat 39+ gothic dark atmospheric environments 15− lackluster bosses and level design 7 96.4%16,558 reviews 34 Unreal Tournament: Game of the Year Edition (2008) Classic · FPS · Action · Free + Iconic weapon design and map mastery 30+ Enduring aesthetic and visual artistry 5 96.7%4,477 reviews 35 No Time (2019) Time Travel · Time Manipulation · Sandbox · $12.99 + Flexible time-travel sandbox 23+ Strong, charming time-travel story 9− Janky mechanics and combat 6 96.9%2,234 reviews 36 STAR WARS Battlefront (Classic, 2004) (2019) Action · Multiplayer · Classic · $9.99 + Timeless, engaging sandbox gameplay 77+ Surprisingly good visuals for 2004 7− Janky, unbalanced, outclassed by sequel 11 96.5%4,730 reviews 37 Fallout: New Vegas (2010) Open World · RPG · Post-apocalyptic · $9.99 + deep roleplaying and build freedom 40+ branching choices and memorable characters 36− frequent crashes and broken quests 31 96.0%262,782 reviews 38 Unreal Tournament 2004: Editor's Choice Edition (2008) FPS · Arena Shooter · Action · Free + Peak arena shooter, timeless masterpiece 48+ OldUnreal patch rescued community support 9− Delisted from Steam, unavailable for purchase 11 96.5%4,241 reviews 39 Rusted Warfare - RTS (2017) RTS · Strategy · Base-Building · $4.99 + Engaging fun strategic gameplay 79+ Exceptional modding community transforms game 28 96.3%7,609 reviews 40 Tabletop Simulator (2015) Tabletop · Board Game · Simulation · $19.99 + flexible tabletop sandbox mechanics 56+ vast Workshop game variety 39− clunky initially obtuse controls 5 96.0%74,870 reviews 41 Rivals of Aether (2017) Fighting · 2D Fighter · Multiplayer · $29.99 + fun, polished platform-fighter mechanics 39+ vast, absurd Steam Workshop roster 34 96.0%38,223 reviews 42 Civilization IV: Beyond the Sword (2007) Strategy · Turn-Based Strategy · 4X · $5.99 + Addictive, deep strategy, meaningful choices 73+ Rich mods, hundreds of hours 18− Unfair combat RNG, limited customization 6 96.2%5,116 reviews 43 SCP – Containment Breach (2026) Horror · Exploration · Atmospheric · Free + complex survival-horror gameplay 15+ workshop and procedural variety 11− unfair high difficulty 9 96.6%2,088 reviews 44 Door Kickers 2: Task Force North (2025) Tactical · Top-Down · Real-Time with Pause · $24.99 + satisfying planning and execution 68+ workshop mods provide endless content 18− unrealistic enemy AI behavior 10 96.0%13,650 reviews 45 STAR WARS Jedi Knight - Jedi Academy (2009) Action · Sci-fi · Third Person · $9.99 + Best lightsaber combat and complete freedom 83+ Excellent dueling with strong mod support 15− Clunky dated controls difficult to learn 6 96.0%13,864 reviews 46 Half-Life 2: Episode One (2006) FPS · Action · Sci-fi · $19.99 + engaging continuation focused on Alyx 11+ polished gunplay and puzzle mechanics 8− overly short episode 6 95.8%31,276 reviews 47 shapez (2020) Automation · Base-Building · Resource Management · $9.99 + Compulsively addictive, lose-track-of-time 56+ Smooth mechanical progression and unlocks 14− Constant factory redesigns with features 9 95.9%15,968 reviews 48 Divinity: Original Sin 2 - Definitive Edition (2017) Tactical RPG · RPG · Turn-Based Strategy · $44.99 + deep tactical combat and builds 47+ rich story and memorable companions 30− steep, poorly explained learning curve 17 95.6%206,331 reviews 49 Car Mechanic Simulator 2021 (2021) Simulation · Automobile Sim · Realistic · $24.99 + detailed, satisfying car repair 90+ mods and broad car variety 11− repetitive, tedious repair chores 17 95.7%38,765 reviews 50 Kerbal Space Program (2015) Space · Simulation · Sandbox · $9.99 + fun deep rocket-building sandbox 91+ mods and enduring sandbox variety 17− steep confusing learning curve 17 95.6%148,061 reviews