Documentation

Overview

Modrex is a free, open-source desktop mod manager for Windows and Linux. Browse, install, and organize mods from modworkshop in one click - no manual file juggling - then launch the game modded or vanilla straight from the app.

Modrex currently supports PAYDAY 3, PAYDAY 2, PAYDAY: The Heist, and Crime Boss: Rockay City, each with its own game path, launcher, launch options, and installed library.

Key Features

• Browse modworkshop - search the catalog with categories, sorting, rich mod pages, and dependency info.
• One-click install - install, enable, disable, and remove mods from .pak, .zip, .7z, .rar, .tar.gz, and .tar.xz files. Multi-file archives are grouped as one mod.
• Organize in folders - sort your library into nested folders with drag-and-drop reordering that sticks.
• Smart updates - Modrex detects out-of-date mods and lets you update them selectively or all at once.
• Launch your way - boot modded or vanilla straight from the app. Vanilla launches hide your mods and restore them on exit.
• Auto-detects your install - finds supported games across their launchers and picks up mods you added outside Modrex.

Start here

Choose a section below based on what you need.

Installation Download Modrex and get it running on Windows or Linux.

Games Launcher support, install targets, and loaders for each supported game.

Concepts How games, targets, archives, loaders, and launch modes fit together.

Using Modrex Install mods, organize your library, and launch the game.

Reference Settings and troubleshooting for Modrex.

Community & Support

• Discord - join the Modrex Discord for support, discussions, and updates.
• Source code - Modrex is open source on GitHub. Report issues or contribute there.