The UFO Key in Sell Lemons sits at the end of a sewer maze puzzle that only opens when you pull a set of colored levers in one exact order. Miss a step, leave the game, or switch servers, and every lever resets, sending you back to the start. Once you collect the key, a second short lever step reveals a hidden alien who hands over the Good Samaritan Badge.
Quick answer: Enter the sewers through any manhole, then pull the levers in this order: Blue, Red, Green, Red, Purple, Red, Green, Red. Collect the UFO Key, then pull the Red and Green levers again to open the path to the alien and earn the Good Samaritan Badge.
Before You Start: Requirements
The key does not spawn early in the game. You must progress far enough to unlock the investor interactions first. If you run the full lever sequence before talking to the investors, you can reach the correct spot and still see nothing there, so clear that step first.
You also need one uninterrupted session. The levers reset if you leave the game or change servers, so set aside enough time to finish the whole sequence in one run.
- Reach the point where you can talk to the investors.
- Enter the sewers through any manhole on the main street.
- Stay in the same server until the key is in hand.
The UFO Key lever order
The colored levers are scattered across the sewer maze, and the puzzle only accepts them in one precise sequence. The Red Lever is used four separate times, which is where most players slip up. Pull each lever exactly as listed below.
| Step | Lever |
|---|---|
| 1 | Blue Lever |
| 2 | Red Lever |
| 3 | Green Lever |
| 4 | Red Lever |
| 5 | Purple Lever |
| 6 | Red Lever |
| 7 | Green Lever |
| 8 | Red Lever |
The Blue Lever is the first pull and can always be reached, so start there without worry. The Red Lever is also open at any time. The Green and Purple levers depend on the order above, and pulling them out of sequence can leave you stuck or lost in the corridors.
Note: If a path stays blocked, recheck the sequence rather than pulling levers at random. One wrong pull can lock progress until the whole puzzle resets.
Collecting the UFO Key
Once the eighth lever is pulled, the hidden pathway to the UFO Key opens. Follow it to the key’s location and pick it up. If you completed the investor step earlier, the key will be visible and ready to collect.
You know it worked when the UFO Key enters your inventory as a permanent progression item. If you reach the spot and the key is missing, you attempted the puzzle before unlocking the investor interactions, so finish that first and run the sequence again.
Unlocking the Good Samaritan Badge
The badge comes from a hidden alien inside the same maze, but the alien only responds after you hold the UFO Key. With the key collected, one more short lever step opens the route to it.
What the badge gives you
The Good Samaritan Badge is more than a collectible. It doubles your investor bonus, raising it from 1% to 2%, which improves long-term earnings inside Sell Lemons. That makes the full sewer run worth finishing rather than a one-off cosmetic reward.
If the badge does not appear, the usual cause is talking to the alien without the UFO Key, or skipping the second Red and Green lever pull. Collect the key first, reopen the path, then approach the alien again to complete the unlock.
