Install Valheim Mods: BepInEx & Safe Rollback

Add one mod to a clean profile

1. 1
   Step 1: Close Valheim, make a dated copy of the world and character saves, install the documented loader in the game folder, and create a separate test profile.
2. 2
   Step 2: Put the mod dependency and plugin files in the paths named by the mod documentation, launch the test profile once, and inspect the loader/plugin log.
3. 3
   Step 3: Add only one plugin per test, save and reload the profile, then remove the last plugin and retest the clean profile when loading or behavior fails; a successful test has a clean launch, the expected plugin path, and an unchanged copied save.
4. 4
   Step 4: Launch once, inspect the log and expected plugin/config path, then stop if the clean profile no longer loads.

Mod installation is easier to debug when loader, dependency, plugin, configuration, and save are visible separately. A large bundle may appear to work until one plugin changes a shared file or prevents the profile from loading.

• Copy the world and character saves before installing the first loader or plugin.
• Launch after one change and inspect the expected plugin and configuration path.
• When the result fails, remove the last change first and return to the clean profile before editing several files.

Roll back before touching the main save

• Remove the last plugin and retest the clean profile.
• Compare the loader and game versions before changing configs.
• Keep the backup outside the active save folder.

Test the next mod safely

• client-side mod guide
• npc mod guide
• texture pack guide
• blueprints guide