MSU Launcher

⭐ ⭐ (514 endorsements) 📥 53,454 downloads 📌 v0.4.6 📅 6/19/2024
🟠 Updated over a year ago

By Enduriel · Utilities

⬇ Download Mod Source: Nexus Mods ↗ 📅 Updated: 9/23/2025 📅 Created: 6/19/2024
⚠️ Potentially Incompatible — Recent Game Update

This mod may not work until the author updates it. Check for an update, or see the rollback guide.

🔍 Analysis

  • 👍 1.0% endorsement rate
  • 🏆 #5 of 51 Utilities mods in this game by downloads

📋 About This Mod

  • []Patches both the Steam and GOG exe files to allow your game to use 4GB of memory.

    []Autodetects Steam exe install path.

    []Allows better compatibility between mods by merging the on_running.txt and on_start.txt for all mods.

    []Source code available on GitHub, final zip is built from GitHub Actions with a verifiable hash.

    []Does not work on modified exe files (The plan is to support all official exes from 1. 5. 0. 15 onwards)

    Hopefully more in the future (specifically mod list management is something I'm working on)

    • []Unzip the file anywhere on your computer except your Battle Brothers data folder.

      []Run the msu-launcher.exe

      []If you have a steam install, the game's location should be autodetected, otherwise use set game location to locate your BattleBrothers.exe file

      []Click download steamless to enable the 4GB patcher

      []Click Run 4GB patcher

    • Launch game from within the launcher (this will also always automatically run the preload patcher)

      FAQ

      Q: Why can't I launch the game from the exe anymore?

      A: For some reason using steamless disables being able to run the game directly from the exe, so you have to use either steam or the launch to launch once you've applied the patch on a steam exe.

      Q: How do I revert the patch?

      A: You can either verify your files or use one of the created backup files in the same folder as the BattleBrothers exe.

      Q: What is Steamless?

      A: Steamless is an external tool available here which removes Steam's basic DRM so that the 4GB patch can be applied without steam complaining. The launcher will automatically download it and put it in the right location for it to be used.

      Modders

      What is on_start.txt/on_running.txt

      These files allow for your brushes to be held in memory, on_start is loaded before the main menu is shown and on_running is loaded after. Not doing this can cause missing brushes and even potential crashes if your brushes are used on the world map, therefore if you have such brushes you should split them up into a separate file and include them in an on_running.txt.

      The launcher collects the preload/on_start.txt and preload/on_running.txt for all mods in the data directory, and creates a mod which contains a merged version of these files.

      The generated mod is registered with modern hooks (so you can require it as a dependency) and it exposes 3 functions for you to validate that your files have been loaded.

      ::MSULauncher.hasResourceOnStart(_resourceName)

      ::MSULauncher.hasResourceOnRunning(_resourceName)

      ::MSULauncher.hasResource(_resourceName)

      Each should be fairly self explanator

🤖 AI-enhanced — based on mod data

MSU Launcher is a utility mod that provides a 4GB patcher for both Steam and GOG versions of the game, along with a patcher to merge preload files for mods. It has 514 endorsements and 53,454 downloads, last updated in September 2025. Source code is available on GitHub.

✨ Key Features

Includes a 4GB patcher for Steam and GOG versions.
Includes a patcher to merge preload files for mods.
Source code available on GitHub for transparency and community contributions.

📊 Pros & Cons

✅ Pros

  • Community-trusted with 514 endorsements and over 53k downloads.
  • Covers both Steam and GOG, so no matter where you bought the game, you're set.
  • Open source on GitHub means you can see exactly what it does or even tweak it yourself.

⚠️ Cons

  • Last updated in September 2025 — could be outdated if the game has since patched.
🎯 Is This For You?
For modders who need to apply the 4GB patch to avoid memory crashes and merge preload files for compatibility. If you're a casual player who just wants to install mods, this might be overkill — but if you're running heavy mod lists, it's a must-have.
📦 Install:Easy· Under 1 minute

💡 Beginner Tips

  • Run the 4GB patcher on your game's executable to enable large address awareness, which helps prevent out-of-memory crashes with many mods.
  • Use the preload file merger after installing mods that add preload files, to ensure they load correctly.
  • Check the GitHub page for any additional documentation or updates that might not be in the mod description.

📊 Mod Details

Game
Battlebrothers Mods
Author
Enduriel
Version
0.4.6
Downloads
53,454
Endorsements
514
Category
Utilities
Created
6/19/2024
Updated
9/23/2025

🔧 How to Install Battle Brothers Mods

Download from Nexus Mods.

📖 Full step-by-step install guide for Battle Brothers →

Visit the official mod page for specific installation instructions for this mod.

🎮 Need cheat codes or console commands? Check ur gaming wiki for Battle Brothers commands, item IDs, and more.

Keep browsing — more Battle Brothers mods await

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