Satisfactory Mod Loader

Satisfactory Mod Loader is the shared framework behind mods for Satisfactory, useful to players building a modded game and developers writing mods. It is a strong fit for manager-based installation and multiplayer-oriented modding, but it adds no gameplay by itself.

Overview

SML helps mods load into Satisfactory’s systems and work alongside one another. As a library, it provides infrastructure rather than player-facing features, so its value depends on the mods you install. Satisfactory Mod Manager installs SML, mods, and their dependencies, and connects to the Satisfactory Mod Repository; the project recommends using the manager instead of installing manually.

Version 3.12.0 is listed as working with both Stable and Experimental versions of Satisfactory. The project says removing SML will not cost you items or progression, a useful safeguard when stepping back from modded play. The repository says uploaded content is checked for malware before approval, while the developer says SML itself makes no external network connections. Neither assurance removes the need to choose individual mods carefully.

Key features

Mod framework and development tools

SML gives mods a shared way to load into game systems and interact with each other. Developers can write Satisfactory mods in Unreal Blueprint or C++; community libraries also support JSON. The repository includes source code, editor utilities, an Unreal project for mod development, and an ExampleMod that demonstrates SML utilities. That is a useful starting point for contributors, though SML remains a foundation rather than a complete mod-development workflow.

Manager integration and multiplayer

Satisfactory Mod Manager handles the loader, mods, and dependencies together, reducing the need to manage those pieces separately. SML is designed with multiplayer in mind, which makes it more relevant to shared modded sessions than a loader with no stated multiplayer focus. The project points users to Discord for modding discussion and support.

Pricing

Satisfactory Mod Loader is free: the plan costs nothing and has no required dependencies. It supports plugin-based mod loading and dependency handling. There are no paid tiers to weigh against the free version, so the trade-off is not price but whether SML and its Satisfactory-specific ecosystem suit your game.

Platforms

Windows is supported for both clients and servers. Linux support is limited to servers; Linux client support is unavailable. Controller support is untested, so players who rely on a controller should not assume a supported experience. The project is licensed under GPL-3.0 and provided as-is.

Who it's for

SML suits Satisfactory players who want mods installed and maintained through Satisfactory Mod Manager, especially those playing multiplayer. It also fits developers who need a common loading framework and bundled examples or editor utilities. It is not the right choice for someone seeking a standalone gameplay change, or for Linux client players who need a supported setup.

Pros and cons

Pros: Free, with no required dependencies, and the manager handles installation of the loader, mods, and dependencies.

Pros: Multiplayer is an explicit design consideration, and uninstalling SML is not expected to erase items or progression.

Pros: Source code, an example mod, editor utilities, and an Unreal project give developers concrete resources to build from.

Cons: SML is a library, not a gameplay mod, so players need other mods to change their game.

Cons: Linux support covers servers but not clients, and controller support is untested.

Cons: The project is provided as-is, which may not suit users looking for a warranty-backed product.

Alternatives

For other game mod loaders, browse the Game Mod Loaders list. Choose MelonLoader instead if you need a free loader spanning Android, Linux, macOS, and Windows; it is published under Apache License 2.0. SMAPI is another free cross-platform choice, but it requires Stardew Valley 1.6.14 or later on Linux, macOS, Windows, or Steam Deck.

Pick BepInEx for a free Linux, macOS, or Windows loader when manual installation and a choice of stable or bleeding-edge builds suit your setup. Everest is a free option for Linux, macOS, Windows, and API platforms. ModTek is the relevant free alternative for BattleTech PC mod loading.

MWSE is a free Linux and Windows option under GNU GPL, with no warranty. Baldur's Gate 3 Script Extender is free for those modding Baldur’s Gate 3 on Linux or Windows, though its Commons Clause restricts selling software whose value substantially derives from it. Hollow Knight Modding API is free across Linux, macOS, and Windows, with no paid tiers or usage limits stated.

Verdict

Choose Satisfactory Mod Loader if you want a free, multiplayer-minded foundation for Satisfactory mods and prefer the manager to handle installation and dependencies. Its strongest case is the combination of shared loading support, developer resources, and vanilla-friendly removal; look elsewhere if you need Linux client support, tested controller support, or a loader for another game.