> ## Documentation Index
> Fetch the complete documentation index at: https://help.freakhosting.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Install Mods and Mission Files in Arma 3

> Master the deployment of community content on your Arma 3 server. Learn how to upload mods, register mission files, and manage Linux case sensitivity.

## Content Injection: Mods & Scenarios

The lifeblood of the Arma 3 ecosystem is its creative community. Whether you are building a casual "King of the Hill" environment or managing a hardcore "MilSim" unit, you will need to master the installation of custom modifications (`@Mods`) and scenario mission files (`.pbo`). This guide explains the correct workflow for deploying these assets to your FREAKHOSTING server.

<CardGroup cols={2}>
  <Card title="Difficulty" icon="gauge-low">
    Intermediate
  </Card>

  <Card title="Time" icon="clock">
    10 Minutes
  </Card>
</CardGroup>

***

## Installing Mods (`@ModName`)

Mods are typically downloaded via the Steam Workshop and must be manually synchronized with your server to ensure performance and security.

<Steps>
  <Step title="Locate Mod Folders">
    Subscribe to your desired mods on the Steam Workshop. On your local PC, navigate to the Arma 3 directory (usually `!Workshop` is a hidden folder) and find the folders prefixed with `@`.
  </Step>

  <Step title="Upload to Server Root">
    Using [SFTP](/portals/game-panel/how-to-connect-via-sftp) or the File Manager, upload the **entire mod folder** (e.g., `@ACE3`) to the root directory of your server.
  </Step>

  <Step title="Manage Security Keys">
    Open the mod's internal `keys` folder. Upload the `.bikey` file inside to the server's root `/keys/` directory. This allows players to pass the [Signature Verification](/games/arma-3/enforcing-v2-signatures).
  </Step>

  <Step title="Activate via Startup">
    In the **Startup** tab of your Game Panel, add the folder name to the `Mods` field.

    * *Example:* `-mod=@CBA_A3;@ACE3;@RHSUSAF`
  </Step>
</Steps>

***

## Installing Missions (`Mission.Map.pbo`)

A mission file is a single package containing all the scripts, unit placements, and objectives for a specific scenario.

<Steps>
  <Step title="Prepare the PBO">
    Ensure your mission file follows the standard naming convention: `MissionName.MapName.pbo` (e.g., `Antistasi.Altis.pbo`).
  </Step>

  <Step title="Upload to mpmissions">
    Place the `.pbo` file directly into the `/mpmissions/` directory on your server.
  </Step>

  <Step title="Automate Loading (Optional)">
    To make this mission load automatically on boot, update the `class Missions` block in your [server.cfg](/games/arma-3/configuring-servercfg-for-arma-3).
  </Step>
</Steps>

***

<Important>
  ### Linux Case Sensitivity

  FREAKHOSTING servers use high-performance Linux kernels. Unlike Windows, Linux is **strictly case-sensitive**.

  * Folder `@ACE3` is **not** the same as `@ace3`.
  * Your folder name in the file system must match your startup parameter **exactly**.
  * **Pro Tip:** We recommend renaming all mod folders to lowercase (e.g., `@ace3`) to prevent configuration errors.
</Important>

***

<Note>
  ### Need Extra Help?

  If you encounter any issues, our support team is ready to assist:

  * **Live Chat:** Quick assistance via our website.
  * **Support Ticket:** [Open a Ticket](https://freakhosting.com/clientarea/submitticket.php)
  * **Discord:** [Join our Community](https://discord.gg/freakhosting)
  * **Email:** [support@freakhosting.com](mailto:support@freakhosting.com)
</Note>

<Tip>
  ### Save on Your Hosting

  Ready to get a new server? Use code **KB20** at checkout for **20% off** your first month!
</Tip>

***

<div align="center">
  **Last Updated:** January 2026 | **Arma 3:** Deployment complete.
</div>