Steal an Egg UFO Event: Signal Decoder & UFO Debris (2026)

The Steal an Egg UFO event (officially the UFO Invasion) is the headline of Update 11. A UFO appears somewhere on the map every 30 minutes, at :00 and :30. To join, you first fix Paranoid Pete’s machine at spawn to earn the Signal Decoder, use it to track the spaceship, then deliver three Abducted eggs to the craft. The UFO leaves behind UFO Debris, and 500 Debris buys one Alien Mutation consumable from Pete, which has a 15% chance to put the Abducted mutation on an egg.

A few details are still single-sourced or patch-dependent, so this guide marks what is confirmed and what is not.

Steal an Egg UFO Event at a Glance

Detail	What We Know
Update	Update 11 (UFO Invasion), live November 2, 2026
Start NPC	Paranoid Pete, found at spawn
Required item	Signal Decoder (earned from Pete’s puzzle)
UFO schedule	Every 30 minutes, at :00 and :30
Delivery task	Three eggs with the Abducted effect
Reward	UFO Debris
Debris shop	Alien Mutation consumable, 500 Debris each
Mutation chance	15% per use
Cost to join	Free, no Robux or Game Pass

How Do You Start the UFO Event?

Everything begins with Paranoid Pete, the new NPC standing at spawn. He insists aliens are coming, and his UFO-detecting machine is broken.

1. Talk to Pete.
2. Interact with the machine on his left.
3. Solve the pipe puzzle by connecting the pipes into one continuous path from the top-left corner to the bottom-right corner.

Finish it and Pete hands over the Signal Decoder. You only need to earn it once, and it is what lets you take part in every UFO window after that. Do this before the next :00 or :30 mark, because the puzzle eats a minute or two and the UFO will not wait.

When Does the UFO Show Up in Steal an Egg?

A UFO spawns on a strict 30-minute rhythm: once at the top of the hour and once at the half hour. That means you get roughly 48 windows a day, and each one is a fresh chance at UFO Debris.

Equip the Signal Decoder when the timer hits and use it to find out which biome the spaceship is hovering over. Then move. A UFO that is deep in a far biome is a different run from one near the safe zone, and the Decoder tells you which one you are dealing with before you commit your Speed and your egg slots.

How to Deliver Abducted Eggs and Earn UFO Debris

This is the core loop, and it is simpler than it sounds:

1. Locate the spaceship with the Signal Decoder.
2. Collect three eggs carrying the Abducted effect.
3. Carry them to the UFO one at a time.
4. After the third egg, the UFO leaves and drops UFO Debris.
5. Pick up the Debris and return to Pete.

Heavy eggs slow you down, the guardians still chase you, and every biome keeps its own Speed gate. The same rule applies as always: if a biome’s guardian outruns you with an egg in hand, you lose the egg and the delivery. One report lists an 18,000,000 Speed minimum for taking part, but that figure comes from a single source and is not confirmed, so check your own in-game prompts before you rely on it.

Where the Abducted eggs come from is also not fully settled. Some coverage says to grab them from the biome the UFO is in; another says any biome works. Until that is clear, the safest play is to start with the biome the Decoder points at and look for eggs with the Abducted glow.

There is also a reported bonus route: lucky players can be abducted into the ship and smash alien incubators with the bat for a large Debris payout. Treat it as a bonus, not a plan, since it is chance-based.

What Is UFO Debris For? The Alien Mutation Consumable

UFO Debris has one confirmed use so far: trading it to Pete for the Alien Mutation consumable.

Item	Cost	Effect
Alien Mutation consumable	500 UFO Debris	Apply to an egg in your pen; 15% chance to give it the Abducted mutation

Two things to keep straight. First, the Abducted effect on an egg (needed for the UFO delivery) and the consumable you buy with Debris are separate things, even though the names overlap. Second, the consumable is applied to an egg in your pen, not an egg you are carrying.

Because the success rate is only 15%, save it for an egg worth the gamble. A mutation on a Common egg is a poor use of 500 Debris. Put it on your most valuable unhatched egg, the same way you would with other mutation consumables. For a sense of what your best eggs and pets are worth, the Steal an Egg all pets list shows rarity and income side by side.

Note: the exact multiplier for the Abducted mutation has not been published, so treat any income number you see online as unverified until it shows up in your Pet Index.

Is the Rare UFO Worth Waiting For?

Each night there is a chance for a Rare UFO to spawn, and players are told they may be able to sneak aboard. That is where the confirmed information stops. The spawn odds, loot, and entry rules have not been verified.

One tracker also mentions an Alien Vault and an Alien Staff inside the ship, plus a “UFO code” for the vault. That code is a vault password you read in-game, not a Roblox redeem code, and the Alien Staff claim is unconfirmed. Do not plan a session around it, and ignore any site selling a “UFO code” list or a free-pet generator. Steal an Egg has no code redemption system.

UFO Invasion vs. Alien Biome: Don’t Mix Them Up

The UFO Invasion is the teaser. The full Alien Biome is a separate drop:

Event	Start	Ends
Alien Biome	Saturday, November 7, 2026, 16:00 UTC (11 AM ET / 8 AM PT / 4 PM GMT / 5 PM CET)	November 14, 19:00 UTC (per the Roblox event listing)

It follows the same pattern as the game’s previous big drops, which you can trace in the full Steal an Egg update history. If you missed the lead-up, the UFO teaser first appeared at the end of the Jonas Brothers concert, and the update before this one was Halloween Part 2. The event also runs on the same 30-minute cadence as the Rift Event, so you can stack your timers if you farm both.

Mistakes That Waste Your UFO Windows

• Showing up without the Signal Decoder. No Decoder, no tracking. Solve Pete’s puzzle first.
• Grabbing the biggest egg every time. Heavy eggs drag your Speed down and get you caught.
• Burning Debris on a low-value egg. At 15%, the mutation is a gamble. Use it on an egg that is worth the risk.
• Mixing up the consumable and the egg effect. One is a reward, the other is a requirement.
• Planning around the Rare UFO. Its odds and loot are unconfirmed.
• Trusting “UFO code” lists. There is no redeem code for this event.

What to Do Before the Alien Biome Lands

• Finish Pete’s puzzle now so you are ready at the next :00 or :30.
• Keep Speed training. Every biome so far has been gated by it.
• Bank your Debris for a mutation attempt on your best unhatched egg rather than spending it early.
• Leave a few pen and pet slots open in case the biome launch brings new eggs.
• Check the official game page on Roblox for patch notes before spending Robux on anything labeled “alien.”