Sell Lemons UFO Key Guide

What is the Sell Lemons UFO Key?

The Sell Lemons UFO Key is a hidden collectible inside the sewer maze that unlocks the Good Samaritan Badge.

Players search "ufo key sell lemons" and "how to get ufo key in sell lemons" for the exact route. The UFO Key in Sell Lemons doubles your investor bonus permanently when combined with the Good Samaritan Badge.

You must complete the sewer lever puzzle and have Alien Investors unlocked before the UFO Key becomes visible in the Sell Lemons sewer maze.

UFO Key lever sequence in Sell Lemons

Extended lever sequence for the Sell Lemons UFO Key after the base sewer puzzle:

• Enter the Sell Lemons sewer from any manhole on the main street.
• Pull Blue lever → Red → Green → Red again → Purple → Red again → Green again → Red again.
• After base sewer puzzle (7-step guide), pull Red and Green levers again to unlock the alien NPC path.
• Collect the Sell Lemons UFO Key once the path opens.

Good Samaritan Badge

After collecting the Sell Lemons UFO Key, talk to the alien stranger inside the sewer maze. Pull Red and Green levers once more to open the path to the alien.

The Good Samaritan Badge has 1.8% earn rate (273,670 players). It doubles Sell Lemons investor bonus from 1% to 2% — essential for late-game evolution.

• All Sell Lemons badges →

UFO Key prerequisites

• Sewer Key purchased with Cosmic Cash.
• Cosmic Farmer Badge earned.
• Base 7-step sewer lever puzzle completed (see sewer guide).
• Alien Investors unlocked via Rebirth at Joe the Alien.
• UFO Key only visible after investor system is active.

Related Sell Lemons Wiki pages

• Sell Lemons sewer guide →
• Sell Lemons sewer map →
• Sell Lemons investors guide →
• All secrets →

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