The UFO Invasion update arrived in on November 2, 2026, introducing a new alien-themed event, a special mutation, and hidden rewards. Players can find Paranoid Pete, repair his machine, and obtain a Signal Decoder to track UFOs appearing around the map.
Completing UFO deliveries rewards players with UFO Debris, a new currency used to purchase Alien Mutation Crystals. You may also encounter a special UFO that pulls you aboard with an abduction beam, giving you a chance to explore its interior and find the hidden Alien Staff.
A separate update, Update 12, is scheduled to introduce the full Alien Biome on November 7, 2026. This is separate from the currently available UFO Invasion content.
This guide covers how to start the UFO Event, collect UFO Debris, obtain the Abducted Mutation, and enter the Secret UFO to unlock Alien Staff.
How to Start the UFO Event
Before joining a UFO encounter, you need to find Paranoid Pete and complete his introductory quest.
1. Find Paranoid Pete
First, head to the Spawn area and look for the NPC Paranoid Pete.
Talk to him, and he will explain that he has discovered signs of alien activity. He will then ask you to repair a machine that can help detect UFO signals.
Accept his quest to begin the repair task.
2. Repair the Machine and Get the Signal Decoder
The machine repair task is a pipe puzzle. You need to connect the pipes to create a complete path from the starting point to the endpoint.
Once you complete the minigame, the machine will be repaired, and Paranoid Pete will reward you with a new device:
Signal Decoder
This is the main tool you need to locate UFOs. After obtaining it, you can use it to track incoming alien signals and find the UFO's location.
How to Find and Complete a UFO Event
1. When Does the UFO Spawn?
Under the normal spawn schedule, a UFO appears every 30 minutes.
The expected spawn times are:
| Spawn Time | Event |
|---|---|
| Every hour at :00 | UFO spawn |
| Every hour at :30 | UFO spawn |
The UFO can appear in different locations around the map, so you will need to use your Signal Decoder to track it down.
2. Use the Signal Decoder to Find the UFO
When an alien signal appears, you will see a Strange Signal notification on your Signal Decoder.
Equip the device and follow its signal readings. The signal strength changes as you move closer to the target, helping you narrow down the UFO's location.
Once you find the UFO, head toward it as quickly as possible. Based on actual gameplay testing, the external mission countdown is approximately five minutes, so avoid wasting too much time searching.
3. Deliver Three Abducted Eggs
Steal three eggs with the Abducted effect from the surrounding area and place them underneath the UFO. Once all three Abducted Eggs have been delivered, you can claim your UFO Debris reward.
It is important to distinguish between two related terms:
- Abducted Eggs: Eggs carrying the Abducted effect that are required for the UFO delivery mission.
- Alien Mutation Crystal: An item purchased with UFO Debris from Paranoid Pete. It can be used to attempt to apply the Abducted Mutation to a pet.
How to Get More UFO Debris
UFO Debris is the main reward currency from the UFO Event. You need it to purchase Alien Mutation Crystals from Paranoid Pete.
The amount you receive is not necessarily the same every time. Based on actual gameplay testing, different egg combinations can result in varying rewards.
| Test | UFO Debris Earned |
|---|---|
| Low-value egg test | Approximately 1,000–1,500 |
| High-value egg test | 2,500 |
According to these tests, several egg characteristics may affect the amount of UFO Debris you receive:
- Egg Rarity: The rarity of the egg.
- Egg Size: How large the egg is.
- Egg Value: The egg's overall value.
If you want to earn more UFO Debris, consider looking for higher-value eggs in areas such as:
- Titan Temple
- Archangel Area
- Enchanted Forest
However, these findings are based on actual gameplay testing, not an officially confirmed reward formula. Higher-value eggs do not guarantee a specific amount of UFO Debris.
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How to Get Alien Mutation
Once you have collected enough UFO Debris, return to Paranoid Pete to purchase an Alien Mutation Crystal.
The in-game trading interface provides the following details:
| Item | Details |
|---|---|
| Item | Alien Mutation Crystal |
| Required Currency | UFO Debris |
| Price | 500 UFO Debris |
| Success Chance | 15% |
| Income Multiplier | ×2.50 |
Each crystal costs 500 UFO Debris, but using it does not guarantee a successful mutation. The application chance is 15%, so you may need multiple attempts.
When successful, your pet receives the Abducted Mutation.
According to the available mutation data, Abducted provides a ×2.50 income multiplier. For example, a pet that normally earns $1B/s could earn approximately $2.5B/s after receiving the mutation, assuming it has no other income modifiers.
How to Enter the Secret UFO and Get Alien Staff
Besides the regular UFO Event, the update also features a special encounter known as the Rare UFO Encounter.
Unlike ordinary UFO encounters, a special UFO may use an abduction beam to pull players aboard. Once inside, you can explore the spaceship, collect extra UFO Debris, and search for the Alien Vault.
1. How to Enter the Secret UFO
According to community reports, Rare UFOs have a chance to appear at night. Keep an eye on the map for a special UFO, as you may be able to sneak aboard using its abduction beam and discover hidden rewards.
Follow these steps:
- Watch for a special UFO encounter.
- Find the beam emitted by the UFO.
- Move close to the beam and wait for it to pull you aboard.
- Once inside, start exploring the spaceship.
Not every UFO encounter guarantees an opportunity to enter the spaceship. The exact spawn chance of the special encounter and a guaranteed way to trigger it have not been confirmed.
2. How to Open the Alien Vault
Inside the Secret UFO, you will find a locked vault called the Alien Vault. It requires a four-digit code to unlock.
The code clue is hidden near the Control Desk. You may initially be distracted by the large clock and the numbers displayed around it, but the actual code can be found on a yellow note beneath the monitor.
SECRET UFO CODE
4827
Check the yellow note beneath the Control Desk monitor to confirm the code in your encounter.
Check the yellow note inside your own UFO before entering the code. Although 4827 worked during testing, it has not been confirmed that every encounter uses the same password.
3. How to Get Alien Staff
After entering the correct code and opening the Alien Vault, you can claim its reward.
Actual gameplay testing confirms that the reward is Alien Staff, which is classified as Uncommon.
If you want to collect this hidden item from the Alien Invasion update, make sure you open the vault and claim the reward before the UFO's internal countdown expires.
What Else Can You Find Inside the Secret UFO?
The Alien Vault is not the only thing worth exploring inside the spaceship.
Once you board the Secret UFO, you have approximately three minutes to explore its interior. There are three main things to focus on:
1. Control Desk
Look for the yellow note beneath the monitor. It contains the four-digit code needed to open the Alien Vault.
2. Alien Vault
Enter the correct code to unlock the vault and claim the hidden Alien Staff reward.
3. Capsules
Destroy the Capsules scattered throughout the spaceship to collect additional UFO Debris.
Because your exploration time is limited, it is best to find the yellow note and open the Alien Vault first. After claiming Alien Staff, use any remaining time to destroy Capsules and collect extra UFO Debris.
Frequently Asked Questions (FAQ)
1. When does the UFO Event spawn in Steal an Egg?
Under the normal schedule, a UFO appears every 30 minutes, at :00 and :30 past each hour.
2. How much does an Alien Mutation Crystal cost?
An Alien Mutation Crystal costs 500 UFO Debris, and it has a 15% chance of successfully applying the Abducted Mutation.
3. What is the Secret UFO code?
The code found during testing is 4827. Check the yellow note beneath the Control Desk monitor to confirm the code in your encounter.
4. How do you get Alien Staff?
Enter the Secret UFO through its Abduction Beam, find the yellow code note, unlock the Alien Vault, and claim Alien Staff.
5. Can you enter every UFO?
No. Entering the spaceship is part of a special UFO encounter. There is no confirmed guarantee that every regular UFO event will provide an opportunity to board.
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