Best Mod 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 mod games. For those who prefer not to search, lists of the most played and best free mod games are available at the bottom of the page.
Filters & Lists
Rusted Warfare - RTS
{{An RTS inspired by the classics of the past!}} Making up for it's subpar retro graphics with fun gameplay and modern multi-threaded tech enabling huge battles to run smooth... Featuring singleplayer challenges, skirmish, sandbox, 10-player multiplayer & workshop modding.
Notruf 112 | Emergency Call 112
Emergency Call 112 – The Fire Fighting Simulation is an exciting, fully detailed simulation of the eventful life of a big city fire department. It was developed in cooperation with and modelled on the fire brigade of Mülheim, Germany. Mülheim has one of the largest and most modern fire stations in Europe.
Transmissions: Element 120
TE120 is a short single player experience set in the Half-Life Universe featuring a gravity defying weapon that allows you to jump buildings and sustain large falls. The story takes place at a mysterious date & location. Where are you? Why have you been sent?
Bloons TD Battles
Go head to head with other players in a Bloon-popping battle for victory. From the creators of best-selling Bloons TD 5, this all new Battles game is specially designed for multiplayer combat, featuring the ability to control bloons directly and send them charging past your opponent's defenses.
Bus Simulator 16
Get behind the wheel of 13 realistic city buses licensed by known city bus manufacturers such as Mercedes-Benz and MAN. Keep an eye on the traffic code and drive your passengers safely to their destinations through five characteristic city districts.
CPUCores :: Maximize Your FPS
Maximize your FPS :: Use CPUCores to isolate and constrain OS + non-game processes and dedicate CPU resources to be used exclusively for your games! CPUCores fully integrates with all Steam games!
Car Mechanic Simulator 2015
New cars, new tools, new options, more parts and much more fun in the next version of Car Mechanic Simulator! Take your wrench! Create and expand your auto repairs service empire. Car Mechanic Simulator 2015 will take you behind the scenes of daily routine in car workshop.
Cities: Skylines
Cities: Skylines is a modern take on the classic city simulation. The game introduces new game play elements to realize the thrill and hardships of creating and maintaining a real city whilst expanding on some well-established tropes of the city building experience.
Construction Simulator 2015
In Construction Simulator 2015, you take the controls of 16 realistic construction machines made by LIEBHERR, STILL and MAN with high-quality 3D graphics.
Farming Simulator 15
Welcome to the new generation of Farming Simulator!With a brand new graphics and physics engine, Farming Simulator 15 offers an immense open world, filled with details and visual effects transporting the Farming Simulator franchise to a new era.
Counter-Strike Nexon
Counter-Strike Nexon is a Free to Play MMOFPS offering competitive PvP and PvE action including content from the original Counter-Strike and all new game modes, map creation function, weapons, and hordes of Zombies!
Fistful of Frags
Multiplayer based, first person enabled, action packed and skill demanding shooter set in the Wild West times. A unique combination of non stop action and slow but powerful weaponry.
Just Cause 2: Multiplayer Mod
JC2-MP is a project to bring multiplayer to Just Cause 2 in all of its magnificent glory. Imagine the chaos of normal Just Cause 2, then extending it out to dozens, hundreds, and even thousands of players.
No More Room in Hell
The chances of you surviving this all out war of society and the undead are slim to none. Already, there are millions of the walking dead shambling about, searching for food to eat. There's no known cure. One bite can possibly end it all for you. However, you aren't alone in this nightmare.
Cry of Fear
Cry of Fear is a psychological single-player and co-op horror game set in a deserted town filled with horrific creatures and nightmarish delusions. You play as a young man desperately searching for answers in the cold Scandinavian night, finding his way through the city as he slowly descends into madness.
STAR WARS™ Empire at War - Gold Pack
Command or corrupt an entire galaxy in the definitive Star Wars strategy collection. It is a time of galactic civil war. Will you take up the reins of the Rebellion, assume control of the Empire, or rule the Star Wars Underworld?
Pirates, Vikings, and Knights II
Pirates, Vikings, and Knights II pits three teams against each other in a struggle for wealth, power and total domination. Whether using the Gunpowder Keg to clear out a territory full of enemies, or the Javelin to pin your dead foes to a wall, you'll find this game both hilarious and exhilarating.
Men of War™
Men of War is a stunning Real-Time Strategy game that takes place during the height of World War II. Intense battles span Europe and North Africa as gamers play as Soviet, Allied or German forces across 19 massive single-player missions.
Dystopia
Dystopia is a cyberpunk game with tense combat situations in a high-tech world spanned by computer networks. Playing as either Punk mercenaries, or Corporate security forces, the player will fight through the physical world to gain access, via jack-in terminals, to cyberspace.
Zombie Panic! Source
Dive into the zombie apocalypse with Zombie Panic! Source: a cooperative, survival-horror first-person-shooter. A fast-paced standalone modification.
Company of Heroes
Delivering a visceral WWII gaming experience, Company of Heroes redefines RTS by bringing the sacrifice of heroic soldiers, war-ravaged environments, and dynamic battlefields to life. Please visit the "Company of Heroes - Legacy Edition" page for additional user reviews.
Team Fortress Classic
One of the most popular online action games of all time, Team Fortress Classic features over nine character classes -- from Medic to Spy to Demolition Man -- enlisted in a unique style of online team warfare. Each character class possesses unique weapons, items, and abilities, as teams compete online in a variety of game play modes.
Most played mod games on Steam
Take a look at the top mod games that are currently attracting the largest player bases on the Steam platform, as of June 15th 2025.
1. Ficket: 追剧引擎
You can browse uniformly the same information scattered on various websites through Ficket. Ficket: 追剧引擎 is a indie, utilities and early access game developed and published by 一个小目标工作室. Released on June 18th 2021 has received 2,107 reviews of which 1,495 were positive and 612 were negative resulting in a rating of 6.9 out of 10. The game has hit the top spot as the #1 most played mod game, thanks to its 101 peak concurrent players over the last day.
6.9
1,495
612
101
players
2. EMERGENCY 4 Deluxe
Coordinate firefighters, police, medical personnel and specialists in the classic EMERGENCY 4 Deluxe! Now with the previously untranslated bonus missions in English. EMERGENCY 4 Deluxe is a simulation, strategy and mod game developed and published by Sixteen Tons Entertainment. Released on April 24th 2018 has received 1,855 reviews of which 1,726 were positive and 129 were negative resulting in a rating of 8.9 out of 10. The game currently holds the #2 spot among the most played mod games.
8.9
1,726
129
80
players
3. EMERGENCY 20
Coordinate your team of first responders in the anniversary edition of EMERGENCY! Featuring 10 remastered classic EMERGENCY missions and three full campaigns, EMERGENCY 20 is the complete package for both experienced and new rescue commanders! EMERGENCY 20 is a strategy, simulation and multiplayer game developed and published by Sixteen Tons Entertainment. Released on October 31st 2017 has received 2,012 reviews of which 1,693 were positive and 319 were negative resulting in a rating of 8.1 out of 10. The game currently holds the #3 spot among the most played mod games.
8.1
1,693
319
39
players
4. Dystopia
Dystopia is a cyberpunk game with tense combat situations in a high-tech world spanned by computer networks. Playing as either Punk mercenaries, or Corporate security forces, the player will fight through the physical world to gain access, via jack-in terminals, to cyberspace. Dystopia is a free to play, multiplayer and action game developed by Puny Human and published by . Released on February 06th 2009 has received 1,089 reviews of which 925 were positive and 164 were negative resulting in a rating of 8.1 out of 10. The game currently holds the #4 spot among the most played mod games.
8.1
925
164
19
players
5. Full Ace Tennis Simulator
Full Ace Tennis Simulator is for those seeking unequaled tennis depth and fun. Full Ace Tennis Simulator is a tennis, simulation and sports game developed by Galactic Gaming Guild and published by Whippering. Released on February 28th 2018 has received 489 reviews of which 440 were positive and 49 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #5 spot among the most played mod games.
8.4
440
49
18
players
6. Football Simulator
Step onto the gridiron with Football Simulator and experience the most dynamic and physics-driven football game ever made. Break through tackles, juggle tipped passes, and dive for interceptions to lead your team to victory. Features a fully moddable environment. Football Simulator is a early access, mod and sports game developed and published by Refactor Games. Released on June 08th 2022 has received 740 reviews of which 586 were positive and 154 were negative resulting in a rating of 7.5 out of 10. The game currently holds the #6 spot among the most played mod games.
7.5
586
154
11
players
7. Prospekt
Prospekt begins in the Nova Prospekt prison in the Half-Life universe. Gordon Freeman is slowly being overrun by soldiers in the prison, however unknown to him, his Vortigaunt allies manage to find some help from a forgotten hero. Prospekt is a action, fps and singleplayer game developed and published by SCT. Released on February 18th 2016 has received 1,629 reviews of which 1,009 were positive and 620 were negative resulting in a rating of 6.1 out of 10. The game currently holds the #7 spot among the most played mod games.
6.1
1,009
620
Free mod games on Steam
Check out this fantastic list of free-to-play mod games you can enjoy on Steam right now, updated on June 15th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play mod games.
1. Dystopia
Dystopia is a cyberpunk game with tense combat situations in a high-tech world spanned by computer networks. Playing as either Punk mercenaries, or Corporate security forces, the player will fight through the physical world to gain access, via jack-in terminals, to cyberspace. Dystopia is a free to play, multiplayer and action game developed by Puny Human and published by . Released on February 06th 2009 has received 1,089 reviews of which 925 were positive and 164 were negative resulting in a rating of 8.1 out of 10. The game currently holds the #1 spot among the most played free mod games on Steam.
8.1
925
164
19
players