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Decky Loader conflict has been resolved in version 3.0

Junk Store Quick Tips

FAQ Quick Tips Troubleshooting Tutorials
Badge Guide:
Decky Decky Plugin only
Pro Pro Version only
Universal Same for both versions
Version Specific Different answer per version

▶ Managing Games 5

How do I install or uninstall a game? Universal
Both Versions: To install a game in Junk Store:
  • Open the game's page in Junk Store and click install.
  • Junk Store Pro: Games are added to the download queue — you can navigate away and continue using Junk Store while they install.
  • Decky Plugin: Stay on the game page until installation is complete.
To uninstall a game in Junk Store:
  1. Open the game's page in Junk Store.
  2. Open the ☰ Slider menu and select Uninstall.
  3. Manually delete any leftover files to free up space:
    • Epic: ~/Games/epic or /*your-SD-card*/Games/epic
    • GOG: ~/Games/gog or /*your-SD-card*/Games/gog
    • Amazon: ~/Games/amazon or /*your-SD-card*/Games/amazon (Pro only)
    • itch: ~/Games/itch or /*your-SD-card*/Games/itch (Pro only)
  4. Decky Plugin tip: Note the game's SteamID before uninstalling so you can locate and clean up its compatdata and shadercache folders.
Important: Uninstalling removes all local save data. To back up saves first, see "How do I find save data for my games?" below.
How do I manage game storage and SD card downloads? Universal
Both Versions:
Changing Download Location: You can set your preferred download location for each platform separately:
  • Select the store tab you want to manage the download location for, e.g. Epic
  • Click the ⚙️ Gear icon to open settings
  • Set your desired download path (e.g. your SD card directory)
  • Press X to save your changes
  • Repeat for each platform you want to configure
Note: Moving existing games is not supported on either version. Moving installed games to SD card is a complex feature to get right; if you need to move a game to a different location it will need to be redownloaded.
How do I manage DLC installations for Steam Deck non-Steam games? Version Specific
Junk Store Pro: Control which DLCs install for your Epic and GOG games without leaving Game Mode:
  • From the game page in Junk Store, click the ⚙️ Settings menu
  • Select Installation
  • Click DLC
  • Toggle DLCs on/off (blue = will install, grey = won't install)
  • Press X to save changes
Timing: Configure before installation to download only wanted DLCs, or update existing games to add/remove DLC content. No external tools or desktop switching required.
Decky Plugin: Yes, DLC is installed automatically by default. If you purchase DLC after installing a game, choose Update to download the new DLC content.

Platform details:
  • Epic Games: DLC is installed automatically by default
  • GOG Games: DLC content is automatically installed by default
Known limitations:
  • Epic Games: Ideally, all Epic DLCs should download automatically, but not all games handle them the same way. It really depends on how the developers packaged the content, and unfortunately, the current plugin solution doesn't catch every scenario
  • GOG Games: We have identified some GOG games that require GOG Galaxy to be installed in order to access the DLC
We're aware of these limitations, but right now we don't have the resources to fully address them.
How do I find save data for my games? Universal
Both Versions:
  1. Find the game's Steam ID at the bottom of its page in Junk Store.
  2. Navigate to the following path on your Steam Deck:
    ~/.local/share/Steam/steamapps/compatdata/<SteamID>/pfx/drive_c/users/steamuser/
  3. From there, follow the path used by your game. Here are some examples:
    • Epic example: Local Settings/Application Data/Dying Light/Saved
    • GOG example: AppData/Roaming/Lonely Troops/Hero of the Kingdom II
Each game may store saves in slightly different locations depending on how it was packaged or ported. Look under AppData, Local Settings, or Documents within the Steam compatibility prefix.
Tip: You can find game save paths on PC Gaming Wiki
How do I set a custom install path for my games? Pro
Junk Store Pro:
You can specify your own path in Junk Store Pro:
  1. Make sure to set the dropdown at the top to All
  2. When setting your install location, select Specify your own path
  3. Put the path to your SD card in the Custom Install Path field
  4. Press X to save your changes

▶ Game Options 3

How do I change game language settings? Version Specific
Junk Store Pro:
You can change your Epic, GOG, Amazon or itch game language settings directly in Game Mode - no desktop switching required.
Tip: For instructions, see: Change Game Language
Decky Plugin:
You can change the language for Epic games that have built-in language support using environment variables directly in Game Mode - no desktop switching required.
Tip: For instructions, see: Change Game Language
How do I enable offline mode for supported games? Version Specific
Junk Store Pro:
You can set offline mode as a global setting or per game.

Per Game setting:
Set offline mode per individual game (improved from the global setting in free alternatives) directly in Game Mode:
  • From the game page in Junk Store, click the ⚙️ Settings menu
  • Select Game Configs
  • Change the dropdown to All
  • Click ENVIRONMENT dropdown
  • Find TOGGLE OFFLINE MODE and turn it on (blue = enabled)
  • Press X to save changes
Global setting:
You can set this from each game tab to set offline mode for all games in game mode:

  • On the store tab in Junk Store, e.g. Epic, click the ⚙️ Settings menu
  • Change the dropdown to All
  • Find TOGGLE OFFLINE MODE and turn it on (blue = enabled)
  • Press X to save changes
Your games that support offline play will now work without internet connection.
Decky Plugin:

Global setting:
You can set this from each game tab to set offline mode for all games in game mode:
  • On the store tab in Junk Store, e.g. Epic, click the ⚙️ Settings menu
  • Change the dropdown to All
  • Find TOGGLE OFFLINE MODE and turn it on (blue = enabled)
  • Press X to save changes
Your games that support offline play will now work without internet connection.
Is it possible to add custom launch arguments to games? Universal
Both Versions:
Yes, you can add custom launch arguments for games in Game Mode via the Proton Config menu.
Tip: For step-by-step instructions, see: Custom Launch Arguments

▶ Performance 3

How do I change the FPS or performance settings for games? Universal
Both Versions:
Just like with regular Steam games, you can change the FPS cap and other performance settings through the Quick Access Menu (QAM).
  • Hit the three-dot button on your Deck to open the QAM
  • Scroll to the performance tab
  • Adjust the FPS, TDP, refresh rate, or any other performance settings from there
This works for all games since they're integrated as Steam shortcuts.
How do I enable LSFG-VK frame generation? Universal
Both Versions:
LSFG-VK is now built into JunkStore. You can easily toggle it on or off and adjust the settings directly, no manual tinkering or separate plugin required.
How do I enable advanced Proton settings on Steam Deck? Universal
Both Versions:
Configure anticheat runtimes and Proton performance settings for your non-Steam games directly in Game Mode:
  • From the game page in Junk Store, click the ⚙️ Settings menu
  • Select PROTON
  • Toggle required settings: EAC, BattlEye, VKD3, ESYNC, FSYNC
  • Adjust Frame Rate, FSR strength, and other performance options
  • Press X to save changes
Advanced Options: Extensive configuration available for power users who want to optimize Epic, GOG, and Amazon game performance without leaving the handheld interface.

▶ Proton & Compatibility 4

How do I change the Proton version for a game? Universal
Both Versions: You can do this from either your Steam Library or directly inside Junk Store.

From Junk Store:
Press Y to open the Steam shortcut.
  1. Click the gear icon ⚙️ → Properties → Compatibility
  2. Select the Proton version you want to use
  3. Relaunch the game
From Steam Library:
  1. Highlight the game and press the Start/Options button (the one with three lines)
  2. Go to Properties → Compatibility
  3. Select the Proton version you want to use
  4. Relaunch the game
Once you've selected a version, back out to the game screen and hit Play.
Tip: If you need custom versions like GE-Proton, see How to Check/Change Proton Version
How do I install custom Proton versions (like GE-Proton)? Universal
Both Versions:
To get GE-Proton or other custom Proton versions, use one of these tools:
  • ProtonUp-QT — Download from the Discover Store (Desktop Mode)
  • Wine Cellar — Install from the Decky Plugin Store (if you have Decky)
After installation, download a GE-Proton release. You can then select it as a compatibility option when changing Proton versions.
Tip: For detailed steps, see How to Check/Change Proton Version
How do I install game dependencies on Steam Deck without Proton Tricks? Pro
Junk Store Pro: Junk Store includes built-in dependency management for common gaming requirements - no third-party tools needed:
  • From the game page in Junk Store, click the ⚙️ Settings menu
  • Select Installation
  • Set dropdown to Expert mode
  • Click Dependencies
  • Toggle needed dependencies on (blue = will install)
  • Press X to save changes
Coverage: Handles most common game dependencies. For rare or game-specific requirements not listed, you may still need external tools. Install before or after game installation as needed.
How do I install anti-cheat dependencies (EAC/BattlEye) for games in Junk Store? Universal
Both Versions:
To install anti-cheat runtimes:
  1. Go to About > System (or Dependencies) in Junk Store
  2. Scroll to find Install Proton Easy Anti Cheat and Install Proton BattlEye Runtime
  3. Select the one(s) you need (greyed out = already installed)
  4. No restart required
To enable for a specific game:
  1. Open the game's Settings (cog icon) → Proton config
  2. Set dropdown to All to see advanced options
  3. Toggle on EAC Runtime or BattlEye Runtime as needed
  4. Press X to save
CRITICAL: Important: Install dependencies to the internal SSD - external drives/microSD can cause issues.

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