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The entire gameplay ofEndless Dungeonis based around taking the Crystal Bot across various floors to fight the final boss at the fourth one. The first three floors contain three Districts each, but you won’t have all these Districts unlocked at the start. Moreover, you may only visit one District on each floor during a certain run.
Each District contains a certain number of Cells, Collectibles, and Recipes. It’s quite important to visit every District equally if you want to progress the game, so here’s everything you need to know about unlocking these Districts.

How To Unlock Every District
The developers have made sure to unlock one District on each floor from the start of the gameso that you may still reach the core without unlocking the other Districts. However, this is nearly impossible because of how difficult the game gets on lower floors even in easy mode.
To unlock the other Districts, you’ll essentiallyhave to get District keys in specific Districts. Here’s how you can find the key for every locked District in the game:

Security Vault
How To Find And Use District Keys
Now that you know where you can find the District Keys to unlock certain Districts, thenext step is to get to that District and start finding the key. As you explore a certain District and open random doors, you’ll sometimes come across chests. These chests can be anywhere in the District, and they’re of two types.
The chest you’re looking forwill have a purple-colored glow on top of them. You’ll be able to get a District Key when you open these purple chests. To use these keys, you simply have to pick them up and go to the Saloon. Head to the top left side of the Saloon and you’ll find an interactable machine where these keys will unlock the respective Districts.
You don’t have to end the run right after you get the key. You cankeep going until it naturally ends.