The latest 99 Nights in the Forest update introduced Diamonds as a crucial currency in the survival-horror game. You can use them to unlock any of the currently available seven classes.

Diamonds are used to unlock Classes in 99 Nights in the Forest, but you can grind them out for free!

With the latest update, four new limited Badges have been added in 99 Nights in the Forest. One of them is the Reconstruction Badge, which gives four Diamonds upon completion.