Secrets & Keys

Sell Lemons is full of hidden secrets and collectibles. Find every key, unlock every hidden area, and earn all badges.

Find the hidden Sewer Key to unlock the secret underground area with exclusive rewards and loot.

Unlock and farm the elite Purity Fruit for massive profit boosts far beyond standard lemons.

Complete guide to all 24 Sell Lemons badges — earn rates, tips, and strategies for every achievement.