Tip of the Week Universal
3 min read

This Week’s Pro Tip: Need to add custom launch arguments to your Epic, GOG, Amazon or itch.io games? Use Junk Store’s Additional Variables or Additional Arguments fields in the Advanced settings!

Note: This tip applies to both versions, but the steps differ slightly between Decky Plugin and 2.0 Standalone.

The Problem

You need to add advanced launch parameters to fix compatibility issues, enable specific features, or optimize performance for your non-Steam games.

The Solution

Easily add or edit launch arguments and variables directly in Junk Store. The content of these fields gets injected into the launch script just before the game launches, ensuring your custom settings persist between updates and launch option resets - no more redoing your tweaks after every game update!

For Junk Store 2.0

  1. From the game page in Junk Store, click the ⚙️ Settings menu

    Click the settings cog icon

    Click the ⚙️ Settings menu on the game page

  2. Select PROTON

    Select Proton from settings

    Navigate to PROTON settings

  3. Set dropdown to Expert or higher

  4. Click ADVANCED

    Click Advanced menu

    Open the ADVANCED section

  5. Navigate to Additional Variables or Additional Arguments field, then press Y to open the built-in text editor

    Additional Variables or Arguments field

    Find the Additional Variables or Additional Arguments field

  6. Press A to open keyboard and type your arguments

    Junk Store 2.0 Additional Variables Interface

    Type your custom launch arguments in the text editor

  7. Press X to save changes

All custom arguments are applied automatically when launching games - no manual Steam shortcut editing required.

For Decky Plugin

  1. From the game page in Junk Store, click the ⚙️ Settings menu

    Click the settings cog icon

    Click the ⚙️ Settings menu on the game page

  2. Select PROTON

    Select Proton from settings

    Navigate to PROTON settings

  3. Set dropdown to All

  4. Click ADVANCED

    Click Advanced menu

    Open the ADVANCED section

  5. Navigate to Additional Variables or Additional Arguments field

    Decky Plugin Additional Variables

    Locate the Additional Variables or Additional Arguments field

  6. Press A to open keyboard and type your arguments

    Decky Plugin Additional Variables Interface

    Type your custom launch arguments

  7. Press X to save changes

All custom arguments are applied automatically when launching games - no manual Steam shortcut editing required.

Pro Tips

💡 Pro Tip: The 2.0 built-in text editor (Press Y) makes adding multi-line arguments much easier with the on-screen keyboard.
💡 Pro Tip: Your custom launch arguments persist even after game updates, unlike manual Steam shortcut edits that get overwritten.
💡 Pro Tip: Common use cases include forcing specific DirectX versions, enabling debug modes, setting language preferences, or adding compatibility flags for older games.

Next Week Preview

Coming next week: Installing Game Dependencies Without Protontricks - Learn how Junk Store 2.0 makes it easy to add Visual C++, .NET Framework, and other Windows components when games won’t launch!

Hope this tip helps! Questions? Our team is always ready to help.

Cheers,
The Junk Store Team

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