How to Get the UFO Key in Sell Lemons — Lever Order & Alien Room

How to Get the UFO Key in Sell Lemons

The UFO Key is one of the most rewarding secrets hidden beneath your lemonade empire. Locked away inside the sewer maze system, this key opens a door to a mysterious alien visitor who hands out a permanent +2% cash bonus on every single investor you own. Unlike temporary boosts, this one compounds through every rebirth and ascension, making it worth the effort early on.

Unlike the Sewer Key puzzle which only uses three levers in a simple sequence, the UFO Key requires a nine-step lever pattern involving all four colored levers with pulls and un-pulls mixed together.

Pro tip: If you finished the Sewer Key already, join a fresh server before starting. All levers reset to default on a new server, giving you a clean slate for the UFO route.

For more underground secrets, see our Sewer Key guide and all secrets list.

The Complete UFO Key Lever Order

Memorize this sequence before heading down — you will need to follow it exactly:

After each lever interaction, hit the respawn button to teleport back to the sewer entrance. Walking back through the maze wastes minutes — respawning takes seconds.

Finding Each Lever — Walkthrough

Blue Lever (Step 1)

This is the furthest lever from the center, tucked at the very end of a long corridor network.

• From the main sewer hub, walk to the opposite side of the "Most Cash" leaderboard and look for green writing on the wall — that is your maze entrance
• Enter and take the first right at the start
• At the first intersection, take the second right
• Keep going straight. You will pass a right turn, then spot a green line on the left wall — do not follow it, just keep moving
• At the end of this stretch, there is a red line on the wall with a right fork ahead — ignore the fork and go left immediately after the red line
• Stay on this straight path with no deviations — it dead-ends right at the blue lever
• Pull it with E, then respawn back to the entrance

Red Lever (Step 2 & 6)

The red lever is conveniently the simplest to reach — it sits at the end of a mostly straight corridor with almost no branching.

• From the sewer hub, walk toward the "Most Fruits" leaderboard
• Look for the jail cell nearby — the maze entrance is just past it on your left side
• Enter and follow the main path straight ahead. Side paths here are short dead ends, so just keep going forward
• The lever is waiting at the end — interact and respawn

You will return here again at Step 6 to pull it a second time.

Green Lever (Step 3 & 7)

• From the sewer hub, the entrance is to the right of the "Most Cash" leaderboard, only a short walk away
• Enter and go down the initial hallway, taking the first left
• Make a right at the following junction
• Push forward past both the red line and the blue line markers on the walls
• After the blue line, stick to left-side paths whenever the corridor branches
• Eventually you will hit a section with three options — take the first right and the green lever is right there
• Pull it, then respawn

You will come back at Step 7 to un-pull this same lever.

Purple Lever (Step 5)

The purple lever's entrance sits on the opposite wall from where the blue lever entrance was — if you did the blue lever first, just walk to the other side of the hub.

• Head toward the green wall text on the opposite side of the sewer hub
• Navigate the corridors forward until you cross a green line on the floor
• Keep going — the purple lever is just past this line
• Pull it and respawn

Grabbing the UFO Key

After completing all eight lever actions (Steps 1–8), the path to the key opens inside the blue lever maze:

• Enter the blue maze using the same route as Step 1
• When you reach the first green line (early in the maze), take a left turn here — this is the critical fork where the UFO path diverges from the blue lever path
• Cross a second green line, then continue walking
• Pass through the blue line marker, then the purple line marker
• The UFO Key is sitting right at the end of this corridor — grab it

Using the Key — Finding the Alien

With the UFO Key in hand and the levers still in their final positions (red and green should be un-pulled from Steps 7–8):

1. Enter the green lever maze from the hub (same entrance as Step 3)
2. After the first left turn inside, take two more consecutive left turns
3. A previously locked door will now be open
4. Walk inside to meet the Alien
5. Interact to claim your rewards

Rewards for Completing the UFO Key Quest

Frequently Asked Questions

Do I need to join a new server before starting the UFO Key route? Yes, if you already completed the Sewer Key. All levers need to be in their default state, and joining a fresh server is the only way to reset them.

What does the UFO Key actually do? It unlocks access to a hidden alien in the sewer who gives you a permanent +2% cash bonus on every investor you own. This scales massively in late game.

Can I do the Sewer Key and UFO Key on the same server? No. Both routes share the same levers, so you must finish one first, then reset by joining a new server before attempting the other.

Is the +2% investor bonus actually worth the maze effort? Absolutely. The bonus is permanent and never goes away. By the time you have hundreds or thousands of investors, the cumulative income boost is enormous.

What badge do I get? The Good Samaritan badge — a visible Roblox badge on your profile for completing the full UFO Key questline.

For more advanced strategies, check out our evolution guide and ascension guide.