Free Mod Games on Steam
Steam currently has 223 Mod games available to download and play. Explore our list of the best free games ranked by popularity and ratings. Data for this list is calculated from reviews and player counts reported directly by Steam and will be updated in real-time. Free Mod game rankings were last updated on 7/1/2025.
Looking for more? Explore other lists such as:
- Best mod games on Steam
- Best mod Steam Deck games
- Best mod Steam games for Mac OS
- Best mod Linux games on Steam
- Free Steam games
- Most played Steam games
- Best rated Steam games
1. tModLoader
Dig, Fight, and Build your way through the world of player-created mods on Terraria with tModLoader - this DLC makes modding Terraria a reality!
tModLoader holds the #1 spot for "best free Mod game on Steam" with a Player Score of 96. Its score was calculated by analyzing a total of 318,449 reviews on Steam. This breaks down to a total of 309,241 positive reviews and 9,208 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play tModLoader on the Steam Deck (though some functionality may be limited).
2. BLEACH Brave Souls
The world of mega-hit manga and anime BLEACH comes to Steam in this exciting 3D action game! Build a team using your favorite characters from the BLEACH universe!
BLEACH Brave Souls has achieved a Player Score of 86, placing it in the #2 spot for the best free Mod games. Its score was calculated by analyzing a total of 11,964 reviews on Steam. This breaks down to a total of 10,597 positive reviews and 1,367 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is not possible to play or run BLEACH Brave Souls on the Steam Deck.
3. 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.
Cry of Fear has achieved a Player Score of 87, placing it in the #3 spot for the best free Mod games. Its score was calculated by analyzing a total of 75,416 reviews on Steam. This breaks down to a total of 66,779 positive reviews and 8,637 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is not possible to play or run Cry of Fear on the Steam Deck.
| Release Date | 4/25/2013 |
| Developer | Team Psykskallar |
| Publisher | Team Psykskallar |
| Steam App Id | 223710 |
4. 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.
No More Room in Hell has achieved a Player Score of 89, placing it in the #4 spot for the best free Mod games. Its score was calculated by analyzing a total of 74,457 reviews on Steam. This breaks down to a total of 66,928 positive reviews and 7,529 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play No More Room in Hell on the Steam Deck (though some functionality may be limited).
| Release Date | 10/31/2013 |
| Developer | No More Room in Hell Team |
| Publisher | Lever Games |
| Steam App Id | 224260 |
5. Downfall - A Slay the Spire Fan Expansion
A FREE complete expansion for Slay the Spire, made by the modding community. Features one brand new normal character, plus a new game mode with SEVEN fully complete new characters starring in a twisted campaign, and so much more.
Downfall - A Slay the Spire Fan Expansion has achieved a Player Score of 94, placing it in the #5 spot for the best free Mod games. Its score was calculated by analyzing a total of 3,968 reviews on Steam. This breaks down to a total of 3,874 positive reviews and 94 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play Downfall - A Slay the Spire Fan Expansion on the Steam Deck (though some functionality may be limited).
| Release Date | 3/25/2022 |
| Developer | Table 9 Studio |
| Publisher | Table 9 Studio |
| Steam App Id | 1865780 |
6. 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.
Bloons TD Battles has achieved a Player Score of 89, placing it in the #6 spot for the best free Mod games. Its score was calculated by analyzing a total of 29,115 reviews on Steam. This breaks down to a total of 26,431 positive reviews and 2,684 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, it is possible to play Bloons TD Battles on the Steam Deck (though some functionality may be limited).
| Release Date | 4/20/2016 |
| Franchise | Ninja Kiwi Games |
| Developer | Ninja Kiwi |
| Publisher | Ninja Kiwi |
| Steam App Id | 444640 |
7. 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 has achieved a Player Score of 93, placing it in the #7 spot for the best free Mod games. Its score was calculated by analyzing a total of 759 reviews on Steam. This breaks down to a total of 754 positive reviews and 5 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play DFHack - Dwarf Fortress Modding Engine on the Steam Deck (though some functionality may be limited).
| Release Date | 4/14/2023 |
| Developer | The DFHack Team |
| Publisher | The DFHack Team |
| Steam App Id | 2346660 |
8. Portal: Revolution
The Portal Mod you've been waiting for. Delve into a new story with original characters, spanning over 8 hours of gameplay and featuring over 40 new challenging test chambers which make use of new mechanics.
Portal: Revolution has achieved a Player Score of 94, placing it in the #8 spot for the best free Mod games. Its score was calculated by analyzing a total of 26,663 reviews on Steam. This breaks down to a total of 25,645 positive reviews and 1,018 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on both Windows and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.
| Release Date | 1/6/2024 |
| Developer | Second Face Software |
| Publisher | Second Face Software |
| Steam App Id | 601360 |
9. Entropy : Zero 2
Bad Cop is back. Command a small army of Combine synths and soldiers on a Northern campaign to capture Dr. Judith Mossman. A modification for Half-Life 2.
Entropy : Zero 2 has achieved a Player Score of 96, placing it in the #9 spot for the best free Mod games. Its score was calculated by analyzing a total of 28,890 reviews on Steam. This breaks down to a total of 28,402 positive reviews and 488 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play Entropy : Zero 2 on the Steam Deck (though some functionality may be limited).
10. 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.
Fistful of Frags has achieved a Player Score of 90, placing it in the #10 spot for the best free Mod games. Its score was calculated by analyzing a total of 36,291 reviews on Steam. This breaks down to a total of 33,157 positive reviews and 3,134 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Fistful of Frags on the Steam Deck (though some functionality may be limited).
| Release Date | 5/9/2014 |
| Developer | Fistful of Frags Team |
| Publisher | Fistful of Frags Team |
| Steam App Id | 265630 |
More Free Mod Games
Explore even more rankings for the 100 best free Mod games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 26,573 | 5/16/2020 | 96 | Free | Steam Charts | |
| 1,305 | 8/18/2020 | 86 | Free | Steam Charts | |
| 431 | 4/25/2013 | 87 | Free | Steam Charts | |
| 333 | 10/31/2013 | 89 | Free | Steam Charts | |
| 213 | 3/25/2022 | 94 | Free | Steam Charts | |
| 197 | 4/20/2016 | 89 | Free | Steam Charts | |
| 195 | 4/14/2023 | 93 | Free | Steam Charts | |
| 117 | 1/6/2024 | 94 | Free | Steam Charts | |
| 76 | 8/20/2022 | 96 | Free | Steam Charts | |
| 63 | 5/9/2014 | 90 | Free | Steam Charts | |
 | 60 | 12/10/2021 | 96 | Free | Steam Charts | |
 | 56 | 10/3/2008 | 87 | Free | Steam Charts | |
 | 53 | 6/25/2015 | 94 | Free | Steam Charts | |
 | 35 | 12/8/2022 | 60 | Free | Steam Charts | |
 | 34 | 2/14/2019 | 91 | Free | Steam Charts | |
 | 34 | 6/9/2009 | 87 | Free | Steam Charts | |
 | 33 | 11/30/2017 | 83 | Free | Steam Charts | |
 | 32 | 3/27/2015 | 91 | Free | Steam Charts | |
 | 32 | 6/1/2017 | 81 | Free | Steam Charts | |
 | 30 | 4/19/2021 | 94 | Free | Steam Charts |
Soures & References
Steambase has best-in-class data powered directly by Steam, our data partners, and in-house experts. Player counts and rankings are enriched, analyzed, and updated in real-time to ensure we surface the most up-to-date insights. Learn more about the Steambase approach to data collection and our review methodology.
- Valve Corporation. (2025, July 1). Steam Store. Steam Store.
- Valve Corporation. (2025, July 1). tModLoader on Steam. Steam Store.
- Valve Corporation. (2025, June 16). BLEACH Brave Souls on Steam. Steam Store.
- Valve Corporation. (2025, May 29). Cry of Fear on Steam. Steam Store.
- Valve Corporation. (2025, May 16). No More Room in Hell on Steam. Steam Store.
- Valve Corporation. (2025, July 1). Downfall - A Slay the Spire Fan Expansion on Steam. Steam Store.
- Valve Corporation. (2025, May 15). Bloons TD Battles on Steam. Steam Store.
- Valve Corporation. (2025, July 4). DFHack - Dwarf Fortress Modding Engine on Steam. Steam Store.
- Valve Corporation. (2025, June 27). Portal: Revolution on Steam. Steam Store.
- Valve Corporation. (2025, May 14). Entropy : Zero 2 on Steam. Steam Store.
- Valve Corporation. (2025, May 14). Fistful of Frags on Steam. Steam Store.