Best Moddable games on Steam
Unlike generic lists, our strategy game recommendations use a rigorous analysis of Steam user reviews to identify and feature only the best, community-validated moddable games. For those who prefer not to search, lists of the most played, top deals and best free moddable games are available at the bottom of the page.
Filters & Lists
Poly Bridge 3
The best just got better! Rediscover your engineering creativity in this genre-defining bridge engineering and puzzle solving masterpiece.
Ghostlore
Ghostlore is an 'Eastpunk' Action-RPG where you fight supernatural monsters from Southeast-Asian folklore. Inspired by classic ARPGs such as Diablo 2 and Titan Quest, Ghostlore features detailed item and character customization systems, procedurally generated maps, and awesome 90's retro graphics.
Age of Wonders 4
Rule a fantasy realm of your own design! Explore new magical realms in Age of Wonders’ signature blend of 4X strategy and turn-based tactical combat. Control a faction that grows and changes as you expand your empire with each turn!
DFHack - Dwarf Fortress Modding Engine
Extensions for Dwarf Fortress, including bugfixes, interface improvements, automation agents, design blueprints, modding building blocks, and other tools.
Supplice
Supplice is a stylish throwback shooter inspired by the mid-90s FPS glory days and the legendary Doom modding community. Mixing the retro stylings of 90s era shooters with colorful graphics and frantic gameplay, it creates an experience that's ever so familiar but also exciting and fresh.
Cataclysm: Dark Days Ahead
The epitome of a modern traditional roguelike: with turn-based play and a RPG-like skill progression system, it hearkens back to some of the major aspects of this genre. This game has an incredible depth, with a deep inventory system, vehicles and boats, NPCs with their own stories, and more.
Ancient Cities
Ancient Cities is a realistic, survival city builder in an immersive procedural environment. Lead the fate of your tribe through ancient times!
Barotrauma
Barotrauma is a 2D co-op submarine simulator – in space, with survival horror and RPG elements. Steer your submarine, complete missions, fight monsters, fix leaks, operate machinery, man the guns and craft items, and stay alert: danger in Barotrauma doesn’t announce itself!
Operation: Harsh Doorstop
Operation: Harsh Doorstop is the ultimate, free to play, tactical shooter sandbox. Play singleplayer, multiplayer, or co-op modes and explore thousands of community-created maps, weapons, and vehicles via the Steam Workshop. Created by ex-developers of Squad, Red Orchestra, and Insurgency.
Waves of Steel
If you like warships but wish they could kickflip, Waves of Steel is for you! Build your own custom warship and embark on a sprawling campaign filled with enemy ships, planes, submarines, and bizarre superweapons. Fast-paced arcade naval action is here!
Juno: New Origins
Bring to life anything you can imagine from rockets and airplanes to cars and more. Automate them with a visual programming language. Explore 3D planets and make your own. Share your creations online. Complete contracts, conquer milestones, and unlock technology in the newly added Career Mode.
Fraymakers
Fraymakers is the ultimate customizable platform fighting game, featuring a cast of some of indie gaming's biggest icons. Duke it out with up to 4 players and call on assists to help out in the heat of battle. Create and play custom characters, stages, modes, and more for infinite fun!
Truck World: Driving School
Learn the basics of truck driving! Truck World: Driving School is a free standalone truck simulator with challenges, grades, and much more.
Gorilla Tag
Run, jump, and climb using only your hands. Play tag or infection with people online. Run away from the infected players, or outmaneuver the survivors to catch them. Embrace your inner ape.
Creature Creator
Create your own creatures to explore online worlds with friends and collect new parts to upgrade your stats and abilities! Complete quests, battle enemies, challenge friends to minigames, or just have fun roleplaying — the possibilities are endless when your imagination is the limit!
Audio Trip
Dance to your favorite music (and workout in “Cardio”) as you catch gems, ride ribbons, smash drums, & dodge barriers. With tracks by Zedd, Lady Gaga, Skrillex, deadmau5, Tiësto, express yourself & get creative with the in-VR editor--with support for your own songs!
X-Plane 12
Ultra-Realistic Flight Simulation
Military Conflict: Vietnam
It's 1968 in Vietnam, the time to 'Make War Not Love'. Side with the Viet Cong or U.S. Army in this intense, fast-paced FPS set in the Vietnam War. Choose from over 200+ weapons of destruction. Kill or be killed!
Snowtopia: Ski Resort Builder
Build your ideal ski resort. Keep skiers smiling with fresh pistes and fine facilities. Ski, build and chill in the wintry world of Snowtopia where everyone is welcome!
Dwarf Fortress
The deepest, most intricate simulation of a world that's ever been created. The legendary Dwarf Fortress is now on Steam. Build a fortress and try to help your dwarves survive against a deeply generated world.
Mount & Blade II: Bannerlord
A strategy/action RPG. Create a character, engage in diplomacy, craft, trade and conquer new lands in a vast medieval sandbox. Raise armies to lead into battle and command and fight alongside your troops in massive real-time battles using a deep but intuitive skill-based combat system.
Victoria 3
Paradox Development Studio invites you to build your ideal society in the tumult of the exciting and transformative 19th century. Balance the competing interests in your society and earn your place in the sun in Victoria 3, one of the most anticipated games in Paradox’s history.Most played moddable games on Steam
Take a look at the top moddable games that are currently attracting the largest player bases on the Steam platform, as of April 30th 2025.
1. Garry's Mod
Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play. Garry's Mod is a sandbox, moddable and multiplayer game developed by Facepunch Studios and published by Valve. Released on November 29th 2006 has received 1,153,288 reviews of which 1,116,314 were positive and 36,974 were negative resulting in an impressive rating of 9.6 out of 10. The game has hit the top spot as the #1 most played moddable game, thanks to its 15,709 peak concurrent players over the last day.
9.6
1,116,314
36,974
15,709
players
2. Fallout: New Vegas
Welcome to Vegas. New Vegas. Enjoy your stay! Fallout: New Vegas is a open world, rpg and post-apocalyptic game developed by Obsidian Entertainment and published by Bethesda Softworks. Released on October 21st 2010 has received 226,078 reviews of which 217,239 were positive and 8,839 were negative resulting in an impressive rating of 9.5 out of 10. While seeing 4,253 players online at once in the last 24 hours, this game is currently ranked #2 among moddable games based on player count.
9.5
217,239
8,839
4,253
players
3. People Playground
Shoot, stab, burn, poison, tear, vaporise, or crush ragdolls in a large open space. People Playground is a sandbox, gore and physics game developed by mestiez and published by Studio Minus. Released on July 23rd 2019 has received 279,084 reviews of which 275,133 were positive and 3,951 were negative resulting in an impressive rating of 9.8 out of 10. While seeing 3,904 players online at once in the last 24 hours, this game is currently ranked #3 among moddable games based on player count.
9.8
275,133
3,951
3,904
players
4. The Elder Scrolls IV: Oblivion® Game of the Year Edition (2009)
PUBLISHER UPDATE - This is the product page for The Elder Scrolls IV: Oblivion Game of the Year Edition, released in 2009. ---The Elder Scrolls IV: Oblivion® Game of the Year Edition presents one of the best RPGs of all time like never before. Step inside the most richly detailed and vibrant game-world ever created. The Elder Scrolls IV: Oblivion® Game of the Year Edition (2009) is a rpg, open world and fantasy game developed by Bethesda Game Studios and published by Bethesda Softworks. Released on June 16th 2009 has received 49,768 reviews of which 47,458 were positive and 2,310 were negative resulting in an impressive rating of 9.4 out of 10. With 3,291 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played moddable games.
9.4
47,458
2,310
3,291
players
5. The Elder Scrolls V: Skyrim
EPIC FANTASY REBORN The next chapter in the highly anticipated Elder Scrolls saga arrives from the makers of the 2006 and 2008 Games of the Year, Bethesda Game Studios. Skyrim reimagines and revolutionizes the open-world fantasy epic, bringing to life a complete virtual world open for you to explore any way you choose. The Elder Scrolls V: Skyrim is a open world, rpg and fantasy game developed by Bethesda Game Studios and published by Bethesda Softworks. Released on November 10th 2011 has received 317,056 reviews of which 300,724 were positive and 16,332 were negative resulting in an impressive rating of 9.4 out of 10. With 1,982 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played moddable games.
9.4
300,724
16,332
1,982
players
6. Workers & Resources: Soviet Republic
Build a soviet republic from an impoverished country into a rich industrial superpower in a city builder with intricate production chains and a fully simulated global economy. Manage the lives of your citizens from education to work and party loyalty to criminal activity. Workers & Resources: Soviet Republic is a strategy, simulation and city builder game developed by 3Division and published by Hooded Horse. Released on June 20th 2024 has received 21,685 reviews of which 19,800 were positive and 1,885 were negative resulting in a rating of 8.9 out of 10. With 1,414 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played moddable games.
8.9
19,800
1,885
1,414
players
7. Car Mechanic Simulator 2021
Work your way to a service empire. Get your hands dirty in a highly realistic simulation game that pays major attention to details. Pay a visit to a new Auction house and buy cars in various conditions. Expand your range of services by investing in a new work space and equipment. Car Mechanic Simulator 2021 is a simulation, automobile sim and sandbox game developed by Red Dot Games and published by PlayWay S.A.. Released on August 11th 2021 has received 29,060 reviews of which 27,884 were positive and 1,176 were negative resulting in an impressive rating of 9.4 out of 10. With 1,061 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played moddable games.
9.4
27,884
1,176
1,061
players
8. Blade and Sorcery
Blade & Sorcery is a built-for-VR medieval fantasy with full physics driven melee, ranged and magic combat. Become a powerful warrior, ranger or sorcerer and devastate your enemies. Blade and Sorcery is a vr, swordplay and moddable game developed and published by WarpFrog. Released on June 17th 2024 has received 57,086 reviews of which 55,191 were positive and 1,895 were negative resulting in an impressive rating of 9.5 out of 10. With 422 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played moddable games.
9.5
55,191
1,895
422
players
9. Fallout 3: Game of the Year Edition
Prepare for the Future™ With Fallout 3: Game of the Year Edition, experience the most acclaimed game of 2008 like never before. Create a character of your choosing and descend into an awe-inspiring, post-apocalyptic world where every minute is a fight for survival. Fallout 3: Game of the Year Edition is a open world, rpg and post-apocalyptic game developed by Bethesda Game Studios and published by Bethesda Softworks. Released on December 17th 2009 has received 50,312 reviews of which 40,828 were positive and 9,484 were negative resulting in a rating of 8 out of 10. With 367 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played moddable games.
8
40,828
9,484
367
players
10. Beat Saber
Beat Saber is a VR rhythm game where you slash the beats of adrenaline-pumping music as they fly towards you, surrounded by a futuristic world. Beat Saber is a vr, rhythm and music game developed and published by Beat Games. Released on May 21st 2019 has received 74,463 reviews of which 71,194 were positive and 3,269 were negative resulting in an impressive rating of 9.4 out of 10. With 345 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played moddable games.
9.4
71,194
3,269
345
players
Best deals on moddable games on Steam
Discover fantastic savings with the best discounts on a variety of moddable games available on Steam right now, updated on April 30th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted moddable games.
1. 112 Operator
Manage emergency services in any city in the world! Take calls and dispatch rescue forces. Handle difficult situations, now depending on the weather, and traffic. Help the citizens through cataclysms and natural disasters, becoming a better emergency number operator every day! 112 Operator is a simulation, realistic and casual game developed by Jutsu Games and published by Games Operators. Released on April 23rd 2020 has received 6,492 reviews of which 5,810 were positive and 682 were negative resulting in a rating of 8.7 out of 10. Featuring a massive 94% discount, this game currently holds the #1 spot in the best deals for moddable category.
8.7
5,810
682
-94%
22.33€
1.34€
2. Ashes of the Singularity: Escalation
A massive-scale real-time strategy game where you command entire armies on a dynamic battlefield. Conquer multiple worlds across several single-player campaigns; or play with your friends in multiplayer combat. Ashes of the Singularity: Escalation is a rts, base-building and pvp game developed by Stardock Entertainment and Oxide Games and published by Stardock Entertainment. Released on November 10th 2016 has received 4,743 reviews of which 3,532 were positive and 1,211 were negative resulting in a rating of 7.3 out of 10. Thanks to its incredible 94% discount, this game is now the #2 best deal in moddable games.
7.3
3,532
1,211
-94%
29.17€
1.75€
3. Fallout: New Vegas
Welcome to Vegas. New Vegas. Enjoy your stay! Fallout: New Vegas is a open world, rpg and post-apocalyptic game developed by Obsidian Entertainment and published by Bethesda Softworks. Released on October 21st 2010 has received 226,078 reviews of which 217,239 were positive and 8,839 were negative resulting in an impressive rating of 9.5 out of 10. Thanks to its incredible 77% discount, this game is now the #3 best deal in moddable games.
9.5
217,239
8,839
-77%
10.17€
2.34€
4. Airport CEO
Build and manage an international airport! Airport CEO is a flight, resource management and moddable game developed and published by Apog Labs. Released on March 04th 2021 has received 7,621 reviews of which 6,381 were positive and 1,240 were negative resulting in a rating of 8.1 out of 10. Currently offered at a significant 72% discount, this title has earned the #4 position in the best deals for moddable games.
8.1
6,381
1,240
-72%
24.39€
6.83€
5. Car Mechanic Simulator 2021
Work your way to a service empire. Get your hands dirty in a highly realistic simulation game that pays major attention to details. Pay a visit to a new Auction house and buy cars in various conditions. Expand your range of services by investing in a new work space and equipment. Car Mechanic Simulator 2021 is a simulation, automobile sim and sandbox game developed by Red Dot Games and published by PlayWay S.A.. Released on August 11th 2021 has received 29,060 reviews of which 27,884 were positive and 1,176 were negative resulting in an impressive rating of 9.4 out of 10. Currently offered at a significant 67% discount, this title has earned the #5 position in the best deals for moddable games.
9.4
27,884
1,176
-67%
24.55€
8.10€
6. Workers & Resources: Soviet Republic
Build a soviet republic from an impoverished country into a rich industrial superpower in a city builder with intricate production chains and a fully simulated global economy. Manage the lives of your citizens from education to work and party loyalty to criminal activity. Workers & Resources: Soviet Republic is a strategy, simulation and city builder game developed by 3Division and published by Hooded Horse. Released on June 20th 2024 has received 21,685 reviews of which 19,800 were positive and 1,885 were negative resulting in a rating of 8.9 out of 10. Currently offered at a significant 66% discount, this title has earned the #6 position in the best deals for moddable games.
8.9
19,800
1,885
-66%
39.56€
13.45€
7. Airships: Conquer the Skies
Construct mighty steampunk airships and fly them into battle, waging war and conquering the skies! Airships: Conquer the Skies is a vehicular combat, 4x and war game developed and published by David Stark. Released on August 16th 2018 has received 5,836 reviews of which 5,598 were positive and 238 were negative resulting in an impressive rating of 9.3 out of 10. Currently offered at a significant 60% discount, this title has earned the #7 position in the best deals for moddable games.
9.3
5,598
238
-60%
24.50€
9.80€
8. The Elder Scrolls V: Skyrim
EPIC FANTASY REBORN The next chapter in the highly anticipated Elder Scrolls saga arrives from the makers of the 2006 and 2008 Games of the Year, Bethesda Game Studios. Skyrim reimagines and revolutionizes the open-world fantasy epic, bringing to life a complete virtual world open for you to explore any way you choose. The Elder Scrolls V: Skyrim is a open world, rpg and fantasy game developed by Bethesda Game Studios and published by Bethesda Softworks. Released on November 10th 2011 has received 317,056 reviews of which 300,724 were positive and 16,332 were negative resulting in an impressive rating of 9.4 out of 10. Currently offered at a significant 58% discount, this title has earned the #8 position in the best deals for moddable games.
9.4
300,724
16,332
-58%
15.17€
6.37€
9. Star Traders: Frontiers
You are the captain of a starship venturing through a massive open universe. Customize your crew and take command at the helm of your very own ship as you explore a galaxy torn apart by internal strife, alien threats, and political intrigue. Star Traders: Frontiers is a sci-fi, moddable and simulation game developed and published by Trese Brothers. Released on July 31st 2018 has received 3,596 reviews of which 3,030 were positive and 566 were negative resulting in a rating of 8.1 out of 10. Currently offered at a 50% discount, this title has earned the #9 position in the best deals for moddable games.
8.1
3,030
566
-50%
14.79€
7.39€
10. KitHack Model Club
Developed by the creator of the original Kerbal Space Program, KitHack Model Club is a physics-based model building sandbox that offers limitless freedom for you and your friends. Design, build, battle, fly (and crash!) your very own RC vehicles, or experiment with over 2,400 ready-made vehicles! KitHack Model Club is a moddable, open world and vehicular combat game developed by Floating Origin Interactive and published by Floating Origin Interactive and Curve Games. Released on August 01st 2024 has received 580 reviews of which 500 were positive and 80 were negative resulting in a rating of 8.1 out of 10. Currently offered at a 50% discount, this title has earned the #10 position in the best deals for moddable games.
8.1
500
80
-50%
18.99€
9.49€
Free moddable games on Steam
Check out this fantastic list of free-to-play moddable games you can enjoy on Steam right now, updated on April 30th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play moddable games.
1. DFHack - Dwarf Fortress Modding Engine
Extensions for Dwarf Fortress, including bugfixes, interface improvements, automation agents, design blueprints, modding building blocks, and other tools. DFHack - Dwarf Fortress Modding Engine is a dwarf, simulation and software game developed and published by The DFHack Team. Released on April 13th 2023 has received 700 reviews of which 695 were positive and 5 were negative resulting in an impressive rating of 9.2 out of 10. With 224 active players enjoying it for free, this strategy game has reached the #1 spot among the top free moddable games on Steam.
9.2
695
5
224
players