If you’re trying to get the alien key in Sell Lemons, you’re really looking for the UFO key hidden inside the sewer maze. This key unlocks a special room that gives you bonus investors, so it’s one of the most useful secrets in the game if you want to boost your progress.
The route can feel confusing at first because the sewers use a maze-like layout with colored text areas and multiple levers. The good news is that the path is consistent once you learn the order. Below, you’ll find a clean step-by-step walkthrough you can follow in-game.
What the alien key does in Sell Lemons
The UFO key is used to open a special room in the sewers. Once you reach the correct room and interact with it, you can get bonus investors.
That makes this one of the more valuable secrets to chase early, especially if you want faster progression. If the maze changes after an update, the best thing to do is compare the route with the current sewer layout in your game.
Quick overview
| Step | What to do |
|---|---|
| 1 | Enter the sewers |
| 2 | Find the corridor with green text |
| 3 | Pull the levers in the required order |
| 4 | Follow the maze route to the UFO key |
| 5 | Return to the correct room and use the key |
| 6 | Claim the bonus investors |
Before you start
A few things can help make the process smoother:
- Move carefully through the sewer corridors
- Use the colored text signs as landmarks
- If you get lost, reset your character to return quicker
- If a route is blocked, you may need to unlock that area first
- Take your time, since the maze has multiple turns and repeats
How to get the alien key in Sell Lemons
Follow these steps in order:
1) Go down into the sewers
Start by jumping into the sewers and locating the corridor marked with green text. This corridor is the main reference point for the route.
2) Follow the first route to the blue lever
From the green-text corridor, go straight through the path until you reach the upper section of the maze. Continue following the turns until you arrive at the blue lever and pull it.
3) Return to the sewer area and pull the red lever
Go back down into the sewers. Find the corridor that leads to the red lever and pull it.
4) Find the green lever
Return to the middle of the sewers and use the corridor with green text again. This time, follow the route that leads to the green lever and pull it.
5) Pull the red lever again
After pulling the green lever, return to the red lever corridor and pull the red lever once more. The route requires some lever repetition, so this is normal.
6) Reach the purple lever
Now follow the path that leads deeper through the maze to the purple lever and pull it.
7) Pull the red lever again
Go back and interact with the red lever corridor again. The sequence expects the levers to be pulled in order, including repeats.
8) Pull the green lever again
Return to the green-text area, then take the path that leads to the green lever and pull it again.
9) Pull the red lever once more
Go back to the red lever corridor and pull it again.
10) Follow the path to the UFO key
After the lever sequence is complete, head back toward the green-text corridor and continue through the maze until you reach the end of the path where the UFO key is located.
Lever sequence reference
Here’s the order as a simple checklist:
| Order | Lever |
|---|---|
| 1 | Blue |
| 2 | Red |
| 3 | Green |
| 4 | Red |
| 5 | Purple |
| 6 | Red |
| 7 | Green |
| 8 | Red |
| 9 | UFO key path unlock |
If you lose track, return to the green-text corridor and retrace your steps carefully. The maze has several repeated turns, so going slowly is better than rushing.
How to use the UFO key
Once you have the UFO key, you still need to bring it to the correct room.
1) Return to the sewer area
Go back toward the red lever section and then retrace the route toward the green-text corridor.
2) Follow the route to the special room
Use the maze path that leads from the green-text area to the correct hidden room. This is the room where the key can be used.
3) Interact with the room
When you reach the right spot, use the UFO key there. After that, you should be able to claim the bonus investors.
Fast tips for navigating the maze
These tips can save you time:
- Watch for the green-text corridor every time you need a starting point
- If you’re unsure, stop and re-orient instead of guessing
- Resetting your character can be faster than running the whole maze backward
- If the sewer area is locked on your server, you may need to unlock access first
- Use the in-game environment as your guide, since updates can shift details
Common mistakes
| Mistake | What happens | Fix |
|---|---|---|
| Skipping a lever | The key path may not appear | Follow the full lever order |
| Using the wrong corridor | You end up in the wrong branch | Return to the green-text area |
| Running too fast | Easy to miss turns | Slow down and pause if needed |
| Trying to use the key in the wrong room | Nothing happens | Keep following the route to the correct room |
Is the alien key worth getting?
Yes. If you want bonus investors, the UFO key is worth the effort. It may take a few tries to learn the maze, but once you know the route, the process becomes much easier.
Because Sell Lemons can change over time, it’s a good idea to check the current sewer layout in your own game if anything seems different after an update.
FAQ
Where is the alien key in Sell Lemons?
The alien key is the UFO key, and it’s found at the end of a route inside the sewer maze after completing the lever sequence.
What does the UFO key do?
It unlocks a special room that gives you bonus investors.
Do I need to pull levers more than once?
Yes. The route requires repeating certain lever steps, so make sure you follow the full sequence.
What should I do if I get lost in the sewers?
Go back to the corridor with green text and retrace the path slowly. Resetting your character can also help you return faster.