Palworld 1.0 Not Launching: Workshop, UE4SS and Remaining Mod Files

Step 1｜Preserve the Steam saves before changing mods

A world with mod-dependent items may no longer load when a mod is removed.

Time: About 3 minutes · Risk: low

1. Close Palworld, wait for Steam Cloud to finish and exit Steam from the system tray.
2. Press Windows+R and open %LOCALAPPDATA%\Pal\Saved\SaveGames.
3. Copy all of SaveGames outside the game and Steam installations. Check that the copy contains the world folders and files.
4. Give the outer backup directory a dated name such as Palworld_before_mod_changes, and do not overwrite the original saves during troubleshooting.

Step 2｜Check in-game mod settings and Workshop subscriptions

Mod Management is an in-game menu, not a Steam settings panel.

Time: About 3–10 minutes · Risk: medium

1. If the title screen opens, use Options → Mod Management to disable active mods. Skip this if the game cannot launch.
2. Open Palworld’s Steam Community Hub → Workshop and find your subscribed items; wording varies with Steam’s language.
3. Unsubscribe from the Palworld mods on their item pages and leave them unsubscribed throughout the comparison.
4. Exit Steam and inspect remaining installation files next. Unsubscribing alone does not prove that manual mods or loaders are absent.

Step 3｜Preserve identifiable manual mods and loader remnants

Work from the actual client installation and retain the original relative paths.

Time: About 5–15 minutes · Risk: medium

1. Use Steam Library → Palworld → Manage → Browse local files. This opens the client installation; do not work in PalServer.
2. Check Pal\Content\Paks for manually installed .pak files, LogicMods or mod folders you created. Move only identified additions to a separate location outside the game.
3. Check Pal\Binaries\Win64 for manually installed UE4SS or DLL loaders. Compare their names with the original installation instructions and download records before moving them.
4. For Workshop-extracted files, check Mods\NativeMods\UE4SS, Mods\ManagedMods and Pal\Content\Paks\~WorkshopMods or LogicMods. Preserve identified remaining mod files outside the installation with their relative paths recorded.
5. Separate manual PAKs, UE4SS and Workshop remnants in the holding directory. If you cannot identify additions safely, use the whole-folder comparison in step 5.

Do not guess which PAKs or DLLs are base-game files from names alone. If a mod manager installed them, consult its installation history too.

Step 4｜Verify the base files and launch without mods

Keep held mods out of the installation while Steam restores any missing managed files.

Time: About 5 minutes or longer · Risk: low

1. Open Steam Library → Palworld Properties → Installed Files → Verify integrity of game files.
2. Wait for verification and downloads to finish; record reacquired files or remaining errors.
3. Restart Steam and launch without resubscribing or returning the held mods.
4. Record whether the title screen opens and whether the failure is limited to loading an existing world.

Step 5｜Choose the next check from both results

Reacquired files alone do not prove which component caused the failure.

Time: About 2 minutes; folder transfers take longer · Risk: medium

1. If the game works after reacquisition, both missing base files and held mods remain candidates. Use step 7 to compare mods individually.
2. If verification reports no problem but launch still fails, revisit the Paks, Win64 and Mods directories; verification does not establish that all additions are absent.
3. If additions cannot be identified, close the game and Steam. With enough free space, move Pal\Binaries\Win64, Pal\Content\Paks and Mods as whole folders outside the game, recording their original paths. Repeat step 4 to reacquire the managed files.
4. If the title still fails after that comparison, record the error, Reliability Monitor evidence and GPU driver state, then use the related general launch guide instead of attributing everything to mods.

Paks includes large base-game files. Holding whole folders needs substantial storage and downloads; start with additions you can identify.

Step 6｜Compare a temporary new world only after backing up

Separate an existing-world problem from a wider failure.

Time: About 5 minutes · Risk: medium

1. Confirm the independent SaveGames backup exists and contains the expected files.
2. Without reinstalling mods, create a temporary new world and check whether it loads.
3. If only the new world works, preserve the existing save unchanged and check the old mods’ compatibility and the save guide.
4. If the new world also fails, record the error and timing and use the general crash guide; do not conclude the original save alone is responsible.

Step 7｜After recovery, compare compatible mods one at a time

Use compatibility information from each distributor for your installed version.

Time: About 5 minutes or more per mod · Risk: medium

1. Confirm that the title and target world work without mods, then preserve another save backup.
2. Subscribe to or reinstall one needed mod whose distributor confirms compatibility with your installed 1.0-series version.
3. Test startup and world loading before adding another. If failure returns, remove the most recent addition and compare again.
4. Do not restore an older UE4SS build or the entire held directory in one operation.