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The Secret of Secrets is an achievement in Plants vs. Zombies: Garden Warfare 2 that was added in the Trials of Gnomus DLC. To earn it, the player must enter the secret area.

In the Town Hall, there is a key near a seagull. However, the seagull will not let the player keep it until the player gives the seagull 25 stars. After this, the player needs to go to the locked door in front of the Chamber of Gnomes. A portal will appear and, after going through the portal and climbing some stairs, the player will find the secret area.


The player must complete multiple quests from the Quest Board, due to the key requiring stars to be bought.

The player should also beware of gnomes in the "Mysterious Area" as they could vanquish the player.