all collectibles collected 4

https://iris-wiki.win/index.php/The_Art_of_the_Survival_Horror_Walkthrough:_Strategies_for_the_Modern_Era

Finally, after hours of searching every corner of the map, you've tracked down every hidden collectible. That last one was tucked away behind a waterfall, nearly impossible to spot. Now your collection is complete, and that satisfying feeling of 100% completion washes over you. No more scanning the environment for glimmers or listening for that distinct chime. It's done.