Mystery Box Key

The Mystery Box Key is a single-use tool in Unturned (version 3). It can be used to open one locked mystery box. For a brief period, Mystery Box Keys were marketable. However, keys sold on the Steam Community Market were often priced much higher than those sold directly from the Stockpile, and its marketability was removed to prevent exploiting unfamiliar players. Even though the item still has a Steam Market listing, most marketable keys have left circulation.

Acquirement

Mystery Box Keys are purchasable from the Stockpile.