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Best Moddable Games

Top 50 of 380 qualifying games — tagged Moddable (community voting), 1,000+ reviews · ranked by Wilson lower bound on Steam review score · review data as of 2026-05-20.

1 People Playground (2019) Sandbox · Gore · Physics · 5M–10M owners · $9.99 98.6%281,763 reviews 2 RimWorld (2018) Colony Sim · Base-Building · Survival · 5M–10M owners · $34.99 98.0%210,517 reviews 3 A Hat in Time (2017) Cute · 3D Platformer · Collectathon · 500K–1M owners · $29.99 97.9%51,687 reviews 4 Mount & Blade: Warband (2010) Medieval · RPG · Open World · 5M–10M owners · $19.99 97.7%166,405 reviews 5 Trombone Champ (2022) Rhythm · Comedy · Funny · 200K–500K owners · $14.99 98.0%9,777 reviews 6 Half-Life 2 (2004) FPS · Action · Sci-fi · 10M–20M owners · $9.99 97.6%245,627 reviews 7 Left 4 Dead 2 (2009) Zombies · Co-op · FPS · 50M–100M owners · $9.99 97.5%963,983 reviews 8 STAR WARS Empire at War - Gold Pack (2010) Strategy · RTS · Space · 1M–2M owners · $19.99 97.6%39,435 reviews 9 BeamNG.drive (2015) Simulation · Driving · Physics · 5M–10M owners · $24.99 97.4%322,278 reviews 10 Euro Truck Simulator 2 (2012) Driving · Transportation · Simulation · 10M–20M owners · $19.99 97.4%867,404 reviews 11 Keep Talking and Nobody Explodes (2015) Co-op · Local Multiplayer · Puzzle · 1M–2M owners · $14.99 97.5%15,747 reviews 12 Factorio (2020) Automation · Base-Building · Resource Management · 5M–10M owners · $35.00 97.0%215,209 reviews 13 Hot Dogs, Horseshoes & Hand Grenades (2016) Sandbox · VR · Physics · 1M–2M owners · $19.99 97.1%22,104 reviews 14 Ravenfield (2017) FPS · War · Singleplayer · 1M–2M owners · $17.99 96.9%73,605 reviews 15 Garry's Mod (2006) Sandbox · Moddable · Multiplayer · 20M–50M owners · $9.99 96.8%1,159,707 reviews 16 POSTAL 2 (2012) Violent · Dark Humor · Open World · 5M–10M owners · $9.99 96.9%116,058 reviews 17 American Truck Simulator (2016) Automobile Sim · Driving · Open World · 2M–5M owners · $19.99 96.8%175,287 reviews 18 IRMÃO Grande & Brasileiro 2 (2021) Simulation · Casual · Party Game · 50K–100K owners · $19.99 97.7%1,197 reviews 19 No Time (2019) Time Travel · Time Manipulation · Sandbox · 20K–50K owners · $12.99 97.5%1,705 reviews 20 Supreme Commander: Forged Alliance (2011) Strategy · RTS · Sci-fi · 1M–2M owners · $12.99 96.8%13,468 reviews 21 Don't Starve (2013) Survival · Open World Survival Craft · Crafting · 2M–5M owners · $9.99 96.6%109,816 reviews 22 Blade and Sorcery (2024) VR · Swordplay · Moddable · 1M–2M owners · $29.99 96.7%57,485 reviews 23 Half-Life (1998) FPS · Classic · 1990's · 10M–20M owners · $9.99 96.5%148,221 reviews 24 Fireworks Mania - An Explosive Simulator (2020) Sandbox · Multiplayer · Singleplayer · 500K–1M owners · $14.99 96.9%6,663 reviews 25 Quake (2007) FPS · Classic · Action · 1M–2M owners · $9.99 96.7%14,400 reviews 26 DOOM + DOOM II (2007) FPS · Classic · 1990's · 1M–2M owners · $9.99 96.5%24,984 reviews 27 Rusted Warfare - RTS (2017) RTS · Strategy · Base-Building · 200K–500K owners · $4.99 96.7%6,241 reviews 28 Left 4 Dead (2008) Zombies · Co-op · Multiplayer · 5M–10M owners · $9.99 96.3%61,894 reviews 29 Counter-Strike: Source (2004) Shooter · FPS · Action · 10M–20M owners · $9.99 96.3%182,234 reviews 30 Fallout: New Vegas (2010) Open World · RPG · Post-apocalyptic · 5M–10M owners · $9.99 96.1%227,700 reviews 31 Incredibox (2021) Casual · Rhythm · 2D · 200K–500K owners · $4.99 96.6%4,727 reviews 32 Unreal Tournament: Game of the Year Edition (2008) Classic · FPS · Action · 200K–500K owners · Free 96.5%4,288 reviews 33 Slice & Dice (2024) Turn-Based Strategy · Rogue-like · Dungeon Crawler · 200K–500K owners · $8.99 96.8%2,131 reviews 34 Unreal Tournament 2004: Editor's Choice Edition (2008) FPS · Arena Shooter · Action · 1M–2M owners · Free 96.5%4,076 reviews 35 shapez (2020) Automation · Base-Building · Resource Management · 200K–500K owners · $9.99 96.2%13,681 reviews 36 STAR WARS Battlefront (Classic, 2004) (2019) Action · Multiplayer · Classic · 1M–2M owners · $9.99 96.5%4,339 reviews 37 OpenTTD (2021) Simulation · Building · Free to Play · 1M–2M owners · Free 96.2%14,394 reviews 38 Spaceflight Simulator (2022) Sandbox · Space Sim · Space · 200K–500K owners · $9.89 96.3%6,318 reviews 39 Civilization IV: Beyond the Sword (2007) Strategy · Turn-Based Strategy · 4X · 500K–1M owners · $5.99 96.3%4,592 reviews 40 Sid Meier's Civilization V (2010) Turn-Based Strategy · Strategy · Turn-Based · 10M–20M owners · $7.49 95.8%204,265 reviews 41 Divinity: Original Sin 2 - Definitive Edition (2017) Tactical RPG · RPG · Turn-Based Strategy · 5M–10M owners · $44.99 95.8%190,124 reviews 42 Car Mechanic Simulator 2021 (2021) Simulation · Automobile Sim · Realistic · 1M–2M owners · $24.99 95.9%29,841 reviews 43 STAR WARS Jedi Knight - Jedi Academy (2009) Action · Sci-fi · Third Person · 500K–1M owners · $9.99 96.1%13,270 reviews 44 Rivals of Aether (2017) Fighting · 2D Fighter · Multiplayer · 1M–2M owners · $29.99 95.9%35,826 reviews 45 Songs of Syx (2020) Early Access · City Builder · Colony Sim · 200K–500K owners · $24.99 96.2%5,822 reviews 46 Half-Life 2: Episode One (2006) FPS · Action · Sci-fi · 5M–10M owners · $19.99 95.8%31,822 reviews 47 Total War: MEDIEVAL II – Definitive Edition (2006) Strategy · Medieval · Historical · 1M–2M owners · $24.99 95.7%33,344 reviews 48 Beat Saber (2019) VR · Rhythm · Music · 2M–5M owners · $29.99 95.6%74,612 reviews 49 Airships: Conquer the Skies (2018) Vehicular Combat · 4X · War · 200K–500K owners · $24.99 95.9%5,947 reviews 50 Fallout: New Vegas Open World · RPG · Post-apocalyptic · 500K–1M owners · $9.99 95.6%48,906 reviews