The UFO Key in Sell Lemons provides a permanent +2% investor return and grants the Good Samaritan badge after retrieving a hidden alien.
Opening the Sewer Maze
To start, pull the blue lever. Then follow the sequence: red, green, un‑pull red, purple, red, un‑pull green, un‑pull red, and finally grab the UFO Key.
Lever Locations
- Blue Lever – Opposite the Most Cash board, near a green wall text. After two right turns, a green line marks the path to the lever. Interact with E and use respawn to return.
- Red Lever (first) – From the central leaderboard, head to the Most Fruits board, pass the jail, and find the maze entrance on the left; move straight to reach the lever.
- Green Lever – Right of the Most Cash leaderboard. Take the first left, then a right, then follow left‑leaning paths; a corridor with three exits awaits—take the right to find the lever.
- Purple Lever – Begin opposite the blue lever entry. Walk through the maze, skip the second red line, head left, cross a green line, and pull the lever.
- Red Lever (second) & Green Lever (deactivation) – After the purple lever, deactivate the green lever by revisiting its spot, then deactivate the red lever again to unlock access to the key.
Locating the UFO Key
Enter the blue lever maze again. From the first green line, turn left instead of going straight. Continue past the blue and purple lines until the key surfaces.
Using the UFO Key and the Alien Encounter
With the lever sequence completed, re‑activate the green lever path. Take two left turns; a door opens to reveal an alien. Press E to interact, receive the permanent cash boost, and earn the badge.
Resetting for a Fresh Attempt
After completing the Sewer Key route, it is advisable to restart the game. Reloading resets all lever states and allows a clean run through the UFO Key puzzle.
Mastering this hidden quest enhances long‑term earnings in Sell Lemons and celebrates players with a tangible badge of achievement.
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