Top-Rated Free Moddable Games on Steam
38 free Moddable games with 500+ reviews and a 70%+ positive rating, newest first.
Browse all Moddable →
SCP – Containment Breach - A procedural first-person horror adventure. You are on your own after something goes terribly wrong in this top-secret containment facility. Collect items to aid in your escape and try to uncover the truth, as horror lurks behind every door. Can you make it out alive?
Feb 20, 2026
Delivery & Beyond - No packages? No problem! Break in. Scrap everything. Deliver... A chaotic online co-op game for up to 5 players (or 15 if you really want to)!
Jan 27, 2026
FALLSTRUKTUR - It takes a while to go back to sleep, but inevitably, you return. To dream of the Fallstruktur.
Aug 6, 2025
TWA - First Haul - Become a truckie in the heart of Australia! Brave the scorching desert, conquer a sandstorm and support the local industry by delivering vital cargo across the continent’s treacherous terrain.
Jun 2, 2025
Rally Mechanic Simulator: Light Edition - Step into the world of rally car mechanics with Rally Mechanic Simulator: Prologue, a free introduction to the full game. Take your first steps as a rally mechanic, facing the challenges of fixing and tuning a rally car.
Jul 12, 2024
The Powder Toy - The Powder Toy is a classic physics sandbox game, which simulates air pressure and velocity, heat, gravity and a countless number of interactions between different substances
Jun 14, 2024
Pyroworks - Pyroworks is a free-to-play online multiplayer game containing fireworks from real-life companies from all over the globe. You can choose to make your own show, cause destruction and chaos or simulate new years. Don't miss out on playing with your friends - the most fun part.
Sep 8, 2023
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 developers of the cancelled Project Reality 2 project.
Feb 15, 2023
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.
Jan 10, 2023
MuseSwipr - A rhythm game where you swipe between two lanes to the beat. Form your own flow and unleash your greatest swiping performance.
Dec 20, 2022
Rock Life: The Rock Simulator - Built from the ground up, Rock Life is the next generation of immersion and simulations. Live, do, and experience what it is like to truly become one with nature... as a rock!
Jul 20, 2022
Kemono Friends Cellien May Cry - A fanfic game of "Kemono Friends". Hack and slash action RPG. You can summon Friends and fight together. There are more than 30 Friends. There are more than 60 types of enemies. There are 4 levels of difficulty, so even people who are not good at action games can enjoy it.
May 1, 2022
Tanks: The Crusades - A top-down shooter with tanks that have various assorted abilities, with support for multiplayer and a level editor.
Jun 24, 2021
Infinitode 2 - Infinite Tower Defense - Infinitode 2 - a strategy in the Tower Defense genre, in which the player will have to build towers to protect his base from endless waves of enemies. The game features huge maps, lots of towers, resource miners, upgrade tree and map editor.
May 6, 2021
OpenTTD - OpenTTD is a business simulation game in which players earn money by transporting passengers and cargo via road, rail, water, and air. It is an open-source remake and expansion of the 1995 Chris Sawyer video game Transport Tycoon Deluxe.
Apr 1, 2021
Krunker - An easy to get into fully moddable First Person Shooter with advanced movement mechanics. Fully Customizable with Mods, Custom Maps and Thousands of Items to Unlock.
Feb 1, 2021
DDNet - Want to play the hardest cooperative 2D platformer ever? Want to finish no map ever? Want to be in pain for hours and cry, getting nothing in return? Come play DDNet with a large community of other sufferers!
Aug 17, 2020
Red Eclipse - Building on over 15 years of gameplay design, Red Eclipse continues to focus on fast paced, agile, easily accessible first person shooter gameplay. For creators, the full power of the Tesseract engine is at your fingertips in the included realtime multiplayer editor.
Dec 19, 2019
Codename CURE - Codename CURE is a first person, co-operative zombie game with support for up to five players, providing dynamic, fast-paced zombie fragging with both objective, and survival-based missions.
Oct 31, 2017
Alien Swarm: Reactive Drop - Co-operative top-down shooter game available for free. An epic bug hunt featuring a unique blend of co-op play and squad-level tactics.
Apr 20, 2017
Simutrans - Simutrans is a freeware and open-source transportation simulator. Your goal is to establish a successful transport company. Transport passengers, mail and goods by rail, road, ship, and even air. Interconnect districts, cities, public buildings, industries and tourist attractions.
May 24, 2016
The Political Machine 2016 - Run for President of the United States as one of dozens of past or present presidential candidates or create your own ideal candidate. Give speeches, go on talk shows, hire unsavory operatives, and do whatever it takes to win on election day.
Feb 4, 2016
Sven Co-op - Sven Co-op is a co-operative game originally based around Valve Software's Half-Life. In this game players must work together against computer controlled enemies and solve puzzles as a team.
Jan 22, 2016
Order of Battle: World War II - Order of Battle: World War II is a breath of fresh air for all strategy fans. It is a game that takes wargaming to a new level by upgrading every single game element and rebooting the genre for a new generation of players.
Apr 30, 2015
DEAD OR ALIVE 5 Last Round: Core Fighters - The free version of the final word in fighting entertainment - DEAD OR ALIVE 5 Last Round!
Mar 30, 2015
Boring Man - Online Tactical Stickman Combat - Battle other 2D stickfigures online while jumping around like a lunatic and getting blown up into smithereens. With over 70 weapons, Boring Man is the most chaotic and hilarious 2D online shooter on the internet.
Feb 20, 2015
Galcon 2: Galactic Conquest - Galcon 2 is a demolition derby in space! Send swarms of ships from planet to planet to conquer the galaxy in this fast paced multiplayer strategy game!
Dec 5, 2014
X-Plane 10 Global - 64 Bit - X-Plane 10 brings numerous improvements and enhancements for PC, Mac and Linux virtual pilots, unleashing the power of modern systems with its 64 bit processing and multi-core support.
Jul 14, 2014
Toribash - Toribash is an innovative free-to-play online turn-based fighting game where you’re able to design your own moves. Complete control over character's body, hundreds of game mods and bloody mess with full body dismemberment - you've never been able to annihilate your enemies like that before!
May 16, 2014
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.
Dec 16, 2013
Counter-Strike 2 - For over two decades, Counter-Strike has offered an elite competitive experience, one shaped by millions of players from across the globe. And now the next chapter in the CS story is about to begin. This is Counter-Strike 2.
Aug 21, 2012
Crusader Kings II - Explore one of the defining periods in world history in an experience crafted by the masters of Grand Strategy.
Feb 14, 2012
Alien Swarm - Co-operative multiplayer game and complete code base available for free.
Jul 19, 2010
SEGA Mega Drive and Genesis Classics - SEGA’s collection of Mega Drive & Genesis Classics comes to a new generation, now updated with even more features: online multiplayer, achievements, mirror mode, rewind, save states, VR and more! Over 50 classic games in one great package. Get into the classics!
Jun 1, 2010
Unreal Tournament 3 - Now includes the free Titan Pack expansion! The Titan Pack gives players a substantial amount of enhanced features and new content, including many original environments, new gametypes, the namesake Titan mutator, powerful deployables and weapons, new characters, and the Stealthbender.
Mar 5, 2009
RollerCoaster Tycoon® 3: Platinum - Rollercoaster Tycoon 3 Platinum combines the excitement of rollercoasters with the fun of a great strategy simulation. RCT3 Platinum combines the roller coaster theme park fun of the Roller Coaster Tycoon 3 with included expansion packs Soaked! and Wild! Now enjoy more options than ever.
Mar 12, 2008
Rome: Total War™ - Collection - Control and conquer the greatest empire ever known to man.
Aug 28, 2007
DOOM 3 - A massive demonic invasion has overwhelmed the Union Aerospace Corporation's (UAC) Mars Research Facility, leaving only chaos and horror in its wake. As one of only a few survivors, you must fight your way to hell and back against a horde of evil monsters.
Aug 3, 2007
