Modrix

Modrix is a free, open-source manager for organizing game modifications through graphical, terminal, or command-line interfaces. It is best suited to players with large or multi-game libraries, especially Linux users running Steam and Proton. Its protective deployment design and detailed conflict controls make it promising, but pre-release software and a source-only macOS installation reduce its appeal for users seeking a settled, turnkey tool.

Overview

One shared engine powers Modrix's GUI, TUI, and CLI frontends, so a mod setup remains consistent whichever interface you use. The project positions itself as an open-source replacement for Vortex. Built-in support covers 86 games, while a community plugin registry can add more; that gives broad reach without limiting the manager to a fixed catalog.

A browser extension hands Nexus Mods download URLs and session cookies to Modrix. The manager then downloads and stages the files without the Nexus API or an API key. This simplifies Nexus setup, although browser-based downloading depends on installing and using the extension.

Key features

Modrix offers profiles for separating configurations, automatic updates, and external links for accessing mod sources. Its link-based deployment is strengthened by hardlinks where possible, backups before overwriting existing files, and a change journal for crash recovery. Deployments can be reversed, giving users a practical recovery path when an installation goes wrong.

Conflict detection identifies clashes between enabled mods. Rules and per-file overrides let you choose which content wins, rather than forcing a blanket load order. That level of control is valuable for complex collections, but it also suits users willing to make decisions about overlapping files.

The CLI supports scripting and JSON output, making repeatable workflows possible for technically minded players. An included MCP server exposes engine functions as tools for agents. Linux users get particularly strong integration: Steam and Proton are treated as first-class environments, and Modrix usually detects Steam-installed games and offers a one-click add-and-switch action.

Security choices are clear. The project states that it collects zero telemetry, while Lua game plugins are sandboxed and their file changes are mediated by the core engine. Modrix is licensed under GPL-2.0-only.

Pricing

Modrix has one plan: Free at free. It is an open-source mod manager with no paid tier or seat charge stated. That makes it suitable for individual players and anyone who wants the full feature set without a subscription; there is no cheaper plan that trades away capabilities because no paid alternatives are offered.

Platforms

Modrix is offered as an extension for Linux, macOS, and Windows, with multi-platform game support. Steam and Proton support makes Linux a strong fit. macOS is the exception to the otherwise straightforward platform story: there is no prebuilt binary, so installation must be done from source. Linux and macOS also do not update automatically in the app. Releases currently run from 0.1.0-beta.1 through 0.1.0-beta.3 and are marked pre-release, so users who need production-level stability should factor that into their choice.

Who it's for

Choose Modrix if you manage mods across several supported games, want separate profiles, or need to inspect and resolve file conflicts precisely. It is especially compelling for Linux players using Steam or Proton, command-line users who automate setup, and privacy-conscious users who prefer zero telemetry. It is less suitable for someone who expects a polished stable release, a ready-made macOS installer, or automatic updating on every desktop platform.

Pros and cons

Pros

• One engine, three interfaces: GUI, TUI, and CLI access the same configurations.
• Safer deployments: hardlinks, backups, journaling, and reversal reduce the damage from failed changes.
• Useful conflict controls: rules and per-file overrides handle overlapping mods at file level.
• Broad game reach: 86 built-in games plus community plugins.
• Linux-aware workflow: Steam and Proton detection with a one-click add-and-switch path.
• Automation and privacy: scripting, JSON output, an MCP server, and zero telemetry.

Cons

• Pre-release status: beta releases are a concern for users who require mature, settled software.
• macOS friction: source installation and no in-app auto-update demand more maintenance.
• Extension-dependent Nexus downloads: browser handoff is required even though an API key is not.
• Conflict resolution takes involvement: granular controls reward knowledgeable users but are not a hands-off solution.

Alternatives

Mod Organizer 2 is the better pick for a Windows-only setup that favors an established free, open-source manager; Windows Store and Gamepass versions are unsupported.

Limo is a Linux-focused free, open-source alternative when you do not need Modrix's stated cross-platform reach.

Modrinth suits users who want a web and API ecosystem across Linux, macOS, and Windows, with an optional Modrinth+ plan at $4.99 a month for ad-free browsing, creator support, and a profile badge.

CurseForge is a web catalog for free Minecraft mods and modpacks, with a separate premium experience.

Vortex is the direct free, open-source Windows alternative from Nexus Mods.

G3M is a free GPL-3.0 desktop manager for Linux, macOS, and Windows.

FlairX Mod Manager is a free, open-source Windows-only option.

HFW Mod Manager is a free downloadable manager for supported Decima-engine games on Linux and Windows.

For a broader comparison, see Game Mod Managers.

Verdict

Modrix is a strong choice for technical players who want open-source, multi-interface mod management with reversible deployments and fine-grained conflict handling, particularly on Linux with Steam or Proton. Look elsewhere if you need a stable release, an installable macOS build, or a more established Windows-first workflow.