If you are on Windows, you can skip straight to Windows quick install guide for a simpler setup if MOH:AA is already installed.

Before you start

The game should be able to run on any modern hardware. You can verify the System requirements.

You will need a copy of MOH:AA, either from GOG, from CD or a from a demo version

💡 GOG version is recommended.

If you already have MOH:AA from a CD, make sure to Install official patches.

Windows users

Download and install Microsoft Visual C++ Redistributable x64.

Linux and macOS users

On Linux, you can download and install a copy from GOG:

Install Innoextract (macOS users: brew install innoextract).
Run the command: innoextract setup_medal_of_honor_2.0.0.21.exe.
Files from the setup will be extracted to a folder called app/.

Alternatively, you can also use WINE to install the game from the setup file, but this process may be slower/more complex if you do not already have it installed and configured.

Installation

Downloading OpenMoHAA

Go to the latest release page
Choose the correct version for your platform:

OS	Kind of hardware (CPU, platform...)	Archive
Windows	AMD/Intel	`-windows-x64.zip` (most Windows PCs - choose this if unsure)*
Windows	Qualcomm/Snapdragon (ARM-based)	`*-windows-arm64.zip`
macOS	Apple Silicon or Intel	`*-macos-multiarch.arm64-x86_64.zip`
Linux	AMD/Intel	`-linux-amd64` (most Linux PCs - choose this if unsure)*
Linux	Raspberry Pi 4 or 5	`*-linux-arm64`

ℹ️ On Windows, -pdb archives are intended for maintainers and contributors, they contain debug information specific to this build and is used for debugging purposes, you don't need them.

Installing OpenMoHAA

Extract the archive¹ into the game folder where MOHAA is installed (the folder that contains the main subfolder and the original game files).
- On Linux/macOS, if MOHAA is installed in /usr/games/mohaa, then extract all files inside /usr/games/mohaa.
- On Windows, if MOHAA is installed in C:\Program Files (x86)\EA Games\Medal of Honor Allied Assault, then extract all files inside C:\Program Files (x86)\EA Games\Medal of Honor Allied Assault.
- Not sure where your game folder is? See the Windows quick install guide for tips on finding it.
Create a shortcut to each of the launch_openmohaa_* executable:
- launch_openmohaa_base (Base game)
- launch_openmohaa_spearhead (Spearhead)
- launch_openmohaa_breakthrough (Breakthrough)

🟢 You're now ready to play! To start the game, execute one of the launch_openmohaa_x binaries.

Notes:

For servers, only omohaaded.*, game.*, and curl binaries from the archive are required.

Appendix

(Optional) Cleaning up the game installation directory

If you want to clean up the mohaa installation directory by keeping only what is needed for OpenMoHAA, the following files/directories can be kept:

[MOHAA]
├── [main]
|   ├── [sound]
|   ├── [video]
│   ├── Pak*.pk3 // all pak files
├── [mainta]
|   ├── [sound]
|   ├── [video]
│   ├── pak*.pk3 // all pak files
├── [maintt]
|   ├── [sound]
|   ├── [video]
│   ├── pak*.pk3 // all pak files
├── All files from the OpenMoHAA archive

Installing official patches (CD only)

If the MOH: Warchest copy is installed, skip directly to the OpenMoHAA installation section.

Otherwise, install the following patches:

Game	Patch to download and install
Allied Assault	Depends on the installed language: English, German, French Italian, Spanish, or Dutch
Spearhead	2.0 to 2.11, followed by 2.11 to 2.15
Breakthrough	2.40b

These patches are required to connect to multiplayer servers and ensure a smooth, bug-free single-player experience.

Obtaining a demo version

Alternatively, free demo versions are available online. Here are the links to the demos:

Game	Type	Link
MOH:AA	Single-player (0.05)	https://www.gamefront.com/games/medal-of-honor/file/single-player-demo
MOH:AA	Multiplayer¹ (1.00)	https://www.gamefront.com/games/medal-of-honor/file/multiplayer-demo
MOH:AA Spearhead	Multiplayer² (2.11)	https://www.gamefront.com/games/medal-of-honor/file/mohaa-spearhead-demo-eng
MOH:AA Breakthrough	Multiplayer² (0.30)	https://www.gamefront.com/games/medal-of-honor/file/mohaa-breakthrough-demo

MOH:AA singleplayer demo ships with the level: Mission 3: Level 3.
MOH:AA multiplayer demo ships with the level: Stalingrad. The Hunt can be added with the MP Demo addon.
MOH:AA Spearhead multiplayer demo ships with multiplayer maps: Malta and Druckkammern.
MOH:AA Breakthrough multiplayer demo ships with multiplayer maps: Anzio and Palermo.

Notes:

Can play on MOH:AA 1.00 servers only.
Only compatible with demo servers. These servers can be identified by having the letter d at the start of their version number (e.g: (d2.11)).

Other platforms and ports

OpenMoHAA is officially supported on Windows, Linux and macOS. Below is a list of unofficial open-source ports that required custom modifications to the OpenMoHAA source code to build and run:

https://github.com/3246251196/openmohaa/tree/AmigaOS4_0_81_1 AmigaOS
https://github.com/Cowcat5150/openmohaa MorphOS
https://github.com/Rinnegatamante/openmohaa PS Vita

To stay up to date with the latest features and fixes from the official repository, these ports depend on their respective maintainers to synchronize changes with the main OpenMoHAA codebase.