This guide assumes you already have Steam and Jalopy installed.

As a small notice, the process of patching Jalopy will have to be redone everytime the game's Proton version changes, so I recommend avoiding Proton Experiental. 10.03 was stable for me, but you can try any version.

Pre-requirements

Before we begin, let's download JaPatcher, and extract it in an easily-accessible folder.

We also need protontricks. Installation varies by your Linux distro. For Fedora, you can use this command in the terminal:

sudo dnf install protontricks

And for the final prereq, we need to create a systemic link to the Jalopy files, to access them from wine's file selector.

First, we need to find Jalopy's game files location, by opening Steam, right clicking on Jalopy, then on Manage, then on Browse local files

This will open a file browser, just copy the location from the navigation bar.

Then, open a terminal and create the systemic link. For this example, we'll be creating it in the home folder ln -s GAMEPATH ~/JALOPY_PATH, where GAMEPATH is the link/location you copied from the file browser, upon clicking on Browse local files

The hard part

As noticed in the beginning of the post, this step requires Jalopy to be already installed, and preferably ran at least once.

We need to run this command, that allows us to edit and install some required things for the game's wine prefix:

protontricks --gui

If you get any warnings/notices, just press OK.

Once you see a menu pop up, follow these steps:

1. Installing .NET

• -> Select default wine prefix
• -> Install Windows DLL/Component
• Select dotnet8 and dotnetdesktop8, and install
• There may be a few installers, just click Install on all of them

2. Making the game load JaLoader

• -> Select default wine prefix
• -> Run winecfg
• Navigate to Libraries
• Write winhttp in the box, and press Add
• Close

3. Running JaPatcher

• -> Select default wine prefix
• -> Run an arbitrary executable
• Navigate to where you extracted JaPatcher.zip, and run JaPatcher.exe
• At this point, JaPatcher should launch successfully.
• For selecting the game folder, click on Browse, click on the Linux drive (most likely Z:), navigate to the /home folder, and double-click on the JALOPY_PATH shortcut (systemic link) we made earlier. This should get you right into the folder with Jalopy.exe, which you can double-click on.
• For now, you MUST use Documents as the mods' location, or choose a custom one, that is on the virtual Windows drive.
• Whatever you choose, remember the path you chose.
• You can now close JaPatcher, the game should work

4. Finding the WINEPREFIX used, for future mod management

• -> Select default wine prefix
• -> Browse files
• This is the WINEPREFIX folder, and, if you navigate to the mod folder location you chose, you should find it there. This is, currently, the only way to access this folder. You may create a shortcut/systemic link for yourself.

5. Installing Mods

• Via your Linux distro's file browser, navigate to the mods' location you chose, in the WINEPREFIX, as indicated in step 4.
• If you did not note down the mods' location, nor the WINEPREFIX location, you can launch the game to find the mods' folder location, and just re-do step 4. for the WINEPREFIX
• Simply drag-drop mods as usual, via the file browser in Linux

5.1. Installing songs

• This is very easy, it is exactly the same as on Windows. The same guide can be repeated, only difference being the file manager used.