Sell Lemons features several hidden secrets, and one of the most valuable is the UFO Key quest. This secret puzzle takes place inside the sewer system and rewards players with access to hidden content, a badge, and a permanent Investor Bonus upgrade. If you attempt the puzzle before unlocking the Investor, the key may not spawn even if you complete everything correctly.
Quick overview of UFO Key in Sell Lemons
| Requirement | Details |
|---|---|
| Game | Sell Lemons (Roblox) |
| Prerequisite | Unlock the Investor |
| Location | Sewer Maze |
| Main Objective | Obtain the UFO Key |
| Extra Reward | Good Samaritan Badge |
| Bonus Effect | Investor Bonus increases from 1% to 2% |
Where the UFO Key quest takes place
The entire quest occurs within the Sewer Maze. You can enter the sewer through any manhole located along the main street. Inside, you’ll find a large maze containing several colored levers. These levers control hidden pathways, and activating them in the correct order opens access to the UFO Key. Leaving the server or resetting the puzzle will require you to start over from the beginning.
How to unlock the UFO Key
After entering the sewers, locate and activate the colored levers in the following sequence:
| Lever Order |
|---|
| Blue – Pull |
| Red – Pull |
| Green – Pull |
| Red – Unpull |
| Purple – Pull |
| Red – Pull |
| Green – Unpull |
| Red – Unpull |
The repeated Red Lever activations are intentional and are the most common reason players fail the puzzle. Pulling a lever out of order can prevent the hidden route from opening properly.
Once the sequence is completed successfully, a hidden route becomes available. Follow the newly opened path to find and collect the UFO Key. Remember that the key only appears if you’ve progressed far enough in the game and unlocked Investor-related progression.
How to get the Good Samaritan Badge
After collecting the UFO Key, head back into the sewer maze. Activate the Red Lever and Green Lever again to open a new path leading to a hidden alien NPC. Speak with the alien to receive the Good Samaritan Badge.
| Reward | Description |
|---|---|
| UFO Key | Secret progression item tied to hidden UFO content |
| Good Samaritan Badge | Special achievement badge |
| Investor Bonus Upgrade | Increases Investor Bonus from 1% to 2% |
The Investor Bonus upgrade is especially useful because it provides a permanent boost to your long-term progression, making the UFO quest one of the most worthwhile secrets currently available in Sell Lemons.
UFO Key puzzle recap
To get the UFO Key in Sell Lemons, first unlock the Investor, enter the Sewer Maze, and activate the levers in this exact order: Blue → Red → Green → Red → Purple → Red → Green → Red. Collect the UFO Key, then activate the Red and Green levers again to reach the hidden alien and unlock the Good Samaritan Badge, which upgrades your Investor Bonus from 1% to 2%.
The UFO Key quest is one of the biggest secrets in Sell Lemons and offers rewards that remain useful long after completion. While navigating the sewer maze can be confusing, following the correct lever sequence and ensuring you’ve unlocked the Investor beforehand will let you obtain both the UFO Key and the Good Samaritan Badge without unnecessary backtracking.
