Secrets & Keys

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

Sewer Key

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

Solve the 7-step lever puzzle in the Sewer Area to get Good Samaritan Badge and unlock the UFO Key route.

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.

Is there an Alien Key? The truth about all alien content in Sell Lemons — UFO Key, Alien Investors, and more.