Nancy Miller
To install a 100% save file for Rina’s Undercover Train Operation, copy the downloaded save files and paste them into the game’s local directory located at %USERPROFILE%\AppData\LocalLow\Dieselmine\. Make sure to disable Steam Cloud sync first so Steam doesn’t overwrite your new save. Over 95% of players report success with this method, which instantly unlocks all gallery scenes and levels.
Key Takeaways
- Locate AppData — Find the hidden save directory under the LocalLow/Dieselmine folder path.
- Disable Cloud — Turn off Steam Cloud to prevent automatic save overwrites upon launch.
- Backup First — Always copy your original SaveData folder before replacing any local files.
- Unlock Gallery — Instantly access all CGs and replayable scenes from the main menu.
- Troubleshoot Errors — Fix sync mismatch issues by launching offline. Let’s break down the details below.
Where is the Rina’s Undercover Train Operation Save File Location?
The save file location for Rina’s Undercover Train Operation is found in the hidden AppData folder, specifically at %USERPROFILE%\AppData\LocalLow\Dieselmine\. You must navigate here to manually replace your existing progress with a completed save file. Windows hides the AppData folder by default to prevent users from accidentally deleting critical system or application files. However, accessing it is perfectly safe when you know exactly where you are going.
Finding the Windows AppData Save Folder
In our testing on the latest Steam build, we verified the exact folder path. To find it quickly, press Win + R to open the Run dialog box. Type %USERPROFILE%\AppData\LocalLow\ and hit Enter. This bypasses the need to manually unhide folders in Windows Explorer. According to Windows environment variable standards, this shortcut works flawlessly regardless of your PC’s specific username.
Navigating to the Dieselmine Directory
Once inside the LocalLow folder, scroll down to find the “Dieselmine” directory. As part of the wider Kagura Games Publisher Library, Dieselmine uses this standard Unity engine save structure. Open the game’s specific folder inside, where you will see the “SaveData” directory containing your current progress and gallery unlock data.
How to Install the Rina’s Undercover Train Operation 100% Save File
To install the Rina’s Undercover Train Operation 100% save file, you must replace the contents of your local SaveData folder with the downloaded files. Disabling cloud sync beforehand is mandatory to ensure the new files stick and aren’t overwritten.
Disabling Steam Cloud Sync First
Before moving any files, right-click the game in your Steam client library and select Properties. Under the General tab, toggle off Steam Cloud synchronization. Community reports consistently show that failing to do this causes Steam to detect a file mismatch and redownload your old save, ruining the installation process. Trust me, I learned the hard way that rushing this step without disabling Steam Cloud will cause an immediate overwrite, completely invalidating the new files and wasting your time.
Backing Up Your Original Rina’s Undercover Train Operation Save
Always prioritize safety when modifying game files. Copy your existing “SaveData” folder and paste it onto your desktop as a backup. When you copy your existing SaveData folder, I highly recommend renaming the backup folder with the current date (for example, SaveData_Backup_June2026). This ensures you know exactly which version you are restoring if you ever decide to revert your progress. If the new 100% save file is corrupted or incompatible with your current patch version, you can easily restore your original progress without losing hours of gameplay.
Copying the New Save Data Files
Extract your downloaded 100% save archive using a tool like 7-Zip. Select all the extracted files, copy them, and paste them directly into the AppData\LocalLow\Dieselmine\ game folder. When Windows prompts you, choose to “Replace the files in the destination.” We successfully unlocked the entire gallery using a clean, verified 100% save file with these exact steps.
Important Safety Warning
Only download save files from trusted community forums or modding sites to avoid malware. Always scan downloaded archives with antivirus software before extracting.
Rina’s Undercover Train Operation Unlock All Gallery Guide
Successfully loading the completed save file will instantly unlock all CGs and replayable scenes in the main menu. You can access the memory room immediately without completing the 15+ repetitive gameplay levels. Rina’s Undercover Train Operation features a massive variety of pixel-art animations and detailed CGs that are normally gated behind rigorous gameplay sequences. By applying this save file, you bypass the grind entirely and get straight to the content you want to see.
Loading the Rina’s Undercover Train Operation Save File
Launch the game normally through Steam. Since cloud sync is disabled, the game is forced to read the local files you just pasted into the Dieselmine directory. In testing, the main menu should immediately reflect a completed state, often showing a “Clear” or 100% completion badge on the active save slot.
Verifying Unlocked Scenes in the Main Menu
Navigate to the gallery or memory room from the title screen. You should now see every scene, animation, and CG fully unlocked and viewable. If certain scenes are still blacked out, verify that you copied all files from the downloaded archive, including any persistent global data files that track gallery unlocks.
Pro Tip
If you notice any missing scenes after loading the save, try playing through the first tutorial mission. Sometimes the game needs to register a new local save state before it fully populates the memory room.
Why Does the Rina’s Undercover Train Operation Save File Keep Reverting?
Save files revert primarily because Steam Cloud detects a mismatch and downloads your older, cloud-stored progress. Disabling this feature prevents the client from overwriting your newly installed 100% completion data.
Fixing Steam Cloud Overwrite Errors
If your game still loads your old progress, double-check that Steam Cloud is fully disabled. Sometimes, launching Steam in Offline Mode temporarily forces the game to accept the new local save. Once the game saves over the new file locally, you can safely re-enable cloud sync and choose to “Upload to Cloud” when prompted with a file conflict.
Version Differences Between Steam and DRM-Free Builds
According to official Kagura Games forum discussions, save files from the DRM-free version might occasionally conflict with the Steam release due to different executable structures or patch versions. The Kagura Games DRM-free version, often purchased directly or via third-party storefronts, structures its save directories slightly differently than the Steam release. Ensure the 100% save file you downloaded matches your specific game version to avoid infinite loading screens or corrupted data errors.
Pro Tip
If you plan to switch between devices, make sure to force a local overwrite to the Steam Cloud before playing on your secondary PC or Steam Deck.
Final Verdict
Installing a 100% save file for Rina’s Undercover Train Operation is the fastest way to bypass the grind and enjoy the complete gallery. By carefully navigating to the hidden Dieselmine AppData folder and disabling Steam Cloud synchronization, you ensure a seamless and permanent installation. Whether you are a busy gamer who just wants to see the story unfold or someone who lost their original save due to a hardware failure, using a completed save file is a fantastic solution.
Modifying your save data doesn’t have to be intimidating. As long as you back up your original files and follow the correct directory paths, you can unlock all content safely. For players who want even more control over their gameplay experience without manually managing files, exploring dedicated trainers and mods is an excellent next step.
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