added instructions for extracting .esm files using innoextract

docs/source/manuals/installation/install-game-files.rst

@@ -68,6 +68,51 @@ You will find ``Morrowind.esm`` there.
 Users of other platforms running Wine, will find it at
 ``~/.wine/drive_c/Program Files/Bethesda Softworks/Morrowind``
 
+Innoextract
+^^^^^^^^^^^
+
+Linux
+~~~~~
+
+If you have purchased "The Elder Scrolls III: Morrowind" from GOG and wish to extract the game files on a Linux system without using Wine, you can do so using ``innoextract``.
+
+For Distributions Using `apt` (e.g., Ubuntu, Debian)
+++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+.. code:: bash
+
+    sudo apt update
+    sudo apt install innoextract
+
+Other Distributions
++++++++++++++++++++
+
+If you are using a Linux distribution that doesn't use apt, search your package manager for the program and install it if it exists.
+
+.. code:: bash
+
+    # openSUSE
+    sudo zypper refresh
+    sudo zypper search innoextract
+    sudo zypper install innoextract
+
+.. code:: bash
+
+    # Arch Linux/Manjaro
+    sudo pacman -Sy
+    sudo pacman -Ss innoextract
+    sudo pacman -S innoextract
+
+Once the program is installed, download the game from GOG. The file should be called ``setup_tes_morrowind_goty_2.0.0.7.exe`` or something similar. When you run ``innoextract`` it will extract the files directly into the folder the ``setup.exe`` file is located. If you have a specific folder where you want it to be extracted to, for example in ``~/Documents/Games/Morrowind`` You can specify it with the ``-d`` flag.
+
+.. code:: bash
+
+    innoextract setup_tes_morrowind_goty_2.0.0.7.exe -d ~/Documents/Games/Morrowind/
+
+If not just run the command without the ``-d`` flag. Assuming you used the filepath above, your ``.esm`` files will be located in this diredctory ``~/Documents/Games/Morrowind/app/Data Files/``.
+
+Now you can run the OpenMW launcher and run the installation wizard. Point it to your ``Morrowind.esm`` in the folder you extracted it to, and enjoy playing Morrowind.
+
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 Steam
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