Keys are used to open Vaults and to purchase items in the Shop.
Green Keys, in particular, are also used to destroy your Headquarters in the event you want to move it, and also to unlock Uservault slots inside your HQ.
Types of Keys
|Picture||Color||Drops from:||Forged from:|
|White Key||Mystery Boxes, Walking Quests, White Vaults and Blue Vaults||-|
|Blue Key||Mystery Boxes, Walking Quests, Blue Vaults and Green Vaults||10 White Keys|
|Green Key||Mystery Boxes, Blue Vaults (very rare) and Green Vaults (rare)||10 Blue Keys|
|Yellow Key||Green Vaults (very rare) and Yellow Vaults (rare)||10 Green Keys|
|Red Key||Yellow Vaults (very rare) and Red Vaults (rare)||10 Yellow Keys|
|Purple Key||Red Vaults (very rare) and Purple Vaults (rare)||10 Red Keys|
|Crystal Key||Can be purchased from Google Store or with collected in-game Cryptocurrency||-|
Regarding the White Key: On August 15, 2021 Kookoopuffs shared on Discord "For lower income countries, we’ll likely have a lower tier of vault. Advertising budgets are scaled to local income levels. But I expect there to be 1 to 2 more tiers below blue that we will deploy in lower income countries."
Regarding the Crystal Key: In the Hunters Lodge 5 on July 15, 2022 Illusionweaver introduced this new key type to be integrated in-game in "early August".
Quests (such as Activity Quests like the Walking/Running Quest) reward players with keys for completing certain milestone goals. Blockchain Quests (such as those used during Events) do not reward players with keys, and instead cost keys to earn progress.
Keybooths were in the game for over a year and a half and allowed players to pick up a free key once per day. They were removed in mid-April 2022.
Players can receive bonus keys from Prize Boxes. Prize boxes come most often from solving vaults, but are also given in some other instances.
Players can use the Forge on their inventory screen to create a higher tier key from 10 lower tier keys. For instance, 10 Blue Keys can be forged into one Green Key.
Players receive 1 Blue Key for every 20th key inserted into one of their Uservaults. These extra keys are sent to the player's Mail Box.
Beginning in "early August" Crystal Keys can be purchased from the Google Play Store or with collected in-game Cryptocurrency.