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Mod managers

Mod Organizer 2

Rank
#5 / 78
Score
8.8
Price
Free
Runs on
Windows
Free plan
Yes
Visit site Alternatives

At a glance

Mod Organizer 2 is a free, open-source Windows tool for installing and uninstalling mod collections. It uses virtualized mod management and supports 64-bit games such as Skyrim Special Edition and Fallout 4, as well as 32-bit games supported by Mod Organizer 1. The tool is designed for experimenting with mods and can manage collections of arbitrary size. Its basic games plugin can detect installations from Steam, GOG, Origin, Epic Games or Legendary, and EA Desktop. A mod data checker can identify and fix different archive layouts for automatic installation. Downloads are available through GitHub Releases and Nexus Mods; the installer is usually preferred and can also create a portable installation. Version 2.5.0 requires Windows 10 1809 or newer, or Windows 11. Its virtual filesystem is incompatible with Windows Store and Gamepass packaging, so those versions of supported games cannot be used. The project is community-maintained, open to contributors, and licensed under GPL-3.0.

Who it is for

MO2 suits Windows players who experiment with mods for supported PC games and want separate mod management. Users of Windows Store or Gamepass game versions should note the compatibility restriction.

What is good

  • Free and open source under GPL-3.0
  • Virtualized mod management
  • Supports supported MO1 32-bit games
  • Installer can create a portable installation

What to know first

  • Requires Windows 10 1809 or newer
  • Windows Store and Gamepass game versions are unsupported
  • Project documentation is described as sparse

VGSources review

Mod Organizer 2: the full review

Mod Organizer 2 provides virtualized collection management for supported Windows games, with downloads from GitHub Releases and Nexus Mods. Check the Windows requirement and store-version limitation before setting it up.

Overview

Mod Organizer 2 (MO2) is a free, open-source mod manager for Windows. It helps players install and remove mods, organize them into profiles, and manage collections of any size. Its defining approach is virtualization: MO2 presents mods to a game without directly deploying them into the game’s files. The project describes itself as a virtualized manager for Bethesda games, while also supporting a range of PC games.

MO2 supports 64-bit games including Skyrim Special Edition and Fallout 4, as well as the 32-bit games supported by the original Mod Organizer. A built-in source-access feature and conflict detection support mod experimentation, while the basic games plugin can check archive layouts and correct them for automatic installation.

The project is open and community-maintained, but it is not complete and still has many issues. Documentation is sparse; the project points users toward the Mod Organizer 1 wiki for general guidance, with a warning that details may differ. Downloads are offered through GitHub Releases and Nexus Mods. The installer is generally the easier setup route and can also create a portable installation.

Key features

  • Profiles: Create separate mod profiles for different setups.
  • Virtual deployment: Manage mods without deploying them directly into the game’s files.
  • Install and uninstall: Add or remove mods, with a mod data checker that can inspect and fix archive layouts for automatic installation.
  • Conflict detection: Identify conflicts between mods.
  • Game discovery: The basic games plugin can detect installations from Steam, GOG, Origin, Epic Games or Legendary, and EA Desktop.
  • Archive previews: Recent releases added previews for BSA archives when the relevant plugin supports them.
  • Community development: The open Discord server supports discussion of suggestions, bug investigation, dev-build testing, and translation contributions.

Pricing

Mod Organizer 2 is free. The listed plan is 0.00 USD per free. No free trial or billing terms are stated.

Platforms

MO2 is for Windows. Version 2.5.0 requires Windows 10 version 1809 or newer, or Windows 11, following its move to Qt 6 and Python 3.11. Windows Store and Game Pass versions of supported games are not compatible because their packaging does not work with MO2’s virtual filesystem.

Its game support covers 64-bit titles such as Skyrim Special Edition and Fallout 4, along with the 32-bit titles supported by MO1. The basic games plugin can find games installed through several major PC launchers, including Steam, GOG, Origin, Epic Games or Legendary, and EA Desktop.

Who it's for

MO2 is aimed at Windows players who experiment with mods and want to keep collections organized through profiles and virtual deployment. It is particularly relevant to players of supported Bethesda games. Users should be prepared for sparse documentation and a project that remains unfinished; those who want to contribute can report issues or join development discussions through GitHub or Discord.

Pros and cons

Pros

  • Free and open source under the GPL-3.0 license.
  • Supports mod profiles, conflict detection, and virtual deployment.
  • Handles collections of arbitrary size and supports both specified 64-bit games and MO1-compatible 32-bit games.
  • Community channels are available for issue reporting, development discussion, testing, and translation work.

Cons

  • The project is unfinished and has many issues.
  • Documentation is sparse, and the suggested MO1 wiki may not fully match MO2.
  • Windows Store and Game Pass versions of supported games are incompatible with the virtual filesystem.
  • Version 2.5.0 requires Windows 10 1809 or newer, or Windows 11.

Alternatives

Players comparing options can browse Mod managers. Other listed tools include Vortex, Modrix, RimSort, Gale Mod Manager, Limo, Wrye Bash, Linux Mod Manager, and Zephyr.

Verdict

Mod Organizer 2 offers a free, open-source way for Windows players to manage large mod collections with profiles, conflict detection, and virtual deployment. Its stated game support and launcher discovery make it a practical option for players whose titles fit its supported setup. The trade-offs are meaningful: the project remains unfinished, documentation is limited, and Store or Game Pass game installations are excluded. It suits mod experimenters comfortable with a community-maintained tool and some uncertainty; users seeking comprehensive documentation or those playing Store and Game Pass versions should look elsewhere.

Mod Organizer 2 plans and pricing

All plans
Mod Organizer 2 Free Windows 10 1809+ or Windows 11 · Windows Store/Gamepass versions unsupported github.com · 30 Sept 2026

Compared on mod managers

Free plan
Yesgithub.com
Mod profiles
Yesgithub.com
Conflict detection
Yesgithub.com
Automatic updates
Yesgithub.com
Mod source access
built-ingithub.com
Supported platforms
windowsgithub.com
Deployment method
virtualgithub.com

Facts

Pricing page
The repository pricing page is unavailable.github.com · 28 Sept 2026
Billing details
No pricing or billing terms are stated in the provided pages.github.com · 28 Sept 2026
Product type
Mod Organizer is a tool for managing mod collections.github.com · 28 Sept 2026
Collection size
It supports mod collections of arbitrary size.github.com · 28 Sept 2026
Target users
It is designed for people who experiment with mods.github.com · 28 Sept 2026
Mod management
It provides an easy and reliable way to install and uninstall mods.github.com · 28 Sept 2026
Supported games
MO2 supports 64-bit games such as Skyrim Special Edition and Fallout 4, plus MO1's 32-bit games.github.com · 28 Sept 2026
Platform scope
It is described as a mod manager for various PC games.github.com · 28 Sept 2026
Project status
The project is open and community-maintained.github.com · 28 Sept 2026
Completion status
The project was not completed and was left with many issues.github.com · 28 Sept 2026
Community support
Users can join the open development Discord server for information and involvement.github.com · 28 Sept 2026
Issue reporting
Issues can be reported on GitHub or the open Discord server.github.com · 28 Sept 2026
Development workflow
The Discord is used to test dev builds, investigate bugs, and discuss suggestions.github.com · 28 Sept 2026
Translation support
Community members can help translate MO2 through the Discord translation channel.github.com · 28 Sept 2026
Download sources
Downloads are available on GitHub.com and NexusMods.com.github.com · 28 Sept 2026
Build instructions
Build instructions are provided through the Modorganizer2/mob project.github.com · 28 Sept 2026
Repository structure
MO2 consists of multiple GitHub repositories that mob downloads as required.github.com · 28 Sept 2026
Software license
The repository uses the GPL-3.0 license.github.com · 28 Sept 2026
Project credits
The page credits Tannin, LePresidente, Silarn, erasmux, and many others.github.com · 28 Sept 2026
Purpose
Mod Organizer is a tool for managing mod collections of arbitrary size and installing or uninstalling mods.github.com · 30 Sept 2026
Game support
Mod Organizer 2 supports 64-bit games such as Skyrim Special Edition and Fallout 4, as well as the 32-bit games supported by MO1.github.com · 30 Sept 2026
Virtualization
The Mod Organizer 2 development team describes it as a virtualized mod management tool for Bethesda games.github.com · 30 Sept 2026
Downloads
The project provides downloads through GitHub Releases and Nexus Mods, with the installer usually preferred for ease of installation.github.com · 30 Sept 2026
Portable installation
The installer can also be used to create a portable Mod Organizer 2 installation.github.com · 30 Sept 2026
Windows requirement
Version 2.5.0 requires Windows 10 1809 or newer, or Windows 11, because of its Qt 6 and Python 3.11 upgrade.github.com · 30 Sept 2026
Store limitation
Mod Organizer 2 cannot support Windows Store or Gamepass versions of supported games because its virtual filesystem is incompatible with their packaging.github.com · 30 Sept 2026
Game launcher integrations
The basic games plugin can detect games installed through Steam, GOG, Origin, Epic Games or Legendary, and EA Desktop.github.com · 30 Sept 2026
Mod installation
The basic games plugin includes a mod data checker that can check and fix different mod archive layouts for automatic installation.github.com · 30 Sept 2026
Release features
Recent releases added BSA archive file preview when the corresponding plugin supports it.github.com · 30 Sept 2026
Open source
The Mod Organizer repository is public and licensed under GPL-3.0.github.com · 30 Sept 2026
Support
Issues are reported through the GitHub page or the open Discord server, which is also used for dev-build testing, bug investigation and suggestions.github.com · 30 Sept 2026
Documentation
The project states that its documentation is sparse and points users to a Mod Organizer 1 wiki for general information with caution about differences.github.com · 30 Sept 2026
Community project
Mod Organizer 2 is an open project maintained by the community and is seeking developers and contributors.github.com · 30 Sept 2026

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