One of the feats/challenges in Forager is to find all of the Secret Rooms in the game. These rooms can be found inside of dungeons, always behind a wall piece. Inside of a secret room, you will usually find some loot such as a small chest which will contain gems.
Now, the easiest and most simplest way to find hidden rooms in Forager is to look for cracks in the wall. This indicates that there is a secret room behind it. In the bottom right area of the screenshot below, you can see the cracks on the wall.
You will need to blow through the wall. The easiest way to do this is using bombs, which you can craft yourself. Throw them at the wall and leave some distance so you don’t take any damage.
If this guide was useful to you, you might be interested in some more Forager Guides that we’ve covered. Secret Room locations are coming soon.