If you want to find all four Simple Keys and their locks while playing Silksong, you'll have to visit various different biomes of the map.

Upon arriving at Ebisugaoka Middle School in Silent Hill f, you’re immediately tasked with finding the Stairwell Key, and so ...

Silksong has four simple keys and four specially locked doors that hide a variety of discoveries. If you found a few and already used them, don’t worry: this guide will help you find and use them all.