Dr. Scramble’s Revenge is the sixth major update for Steal an Egg, and it flips the story on its head: instead of chasing Sammy, Dr. Scramble now has Ben in his sights for what the update calls the final showdown. Mechanically, three things changed at once — the old lobby trade-in machine is gone, a timed Mech boss fight now runs on a portal cycle, and a separate Robux-only Extinction Egg landed in the Featured shop.
The live invasion itself runs from September 26, 2026 at 11 a.m. ET through September 27, 2026 at noon ET, but the systems it introduces — the new Lab, its banners, and the pity bar — are staying in the game long after that window closes.
What Actually Changed in Update 6
Update 6 touches both sides of the normal egg-and-hatch loop rather than just adding one new feature. The table below breaks down what changed and what you’re actually expected to do differently as a result.
| System | What Changed | What You Do Now |
| Dr. Scramble’s Lab | Replaces the old lobby trade-in machine with rotating banners and direct egg submissions | Read the active banner’s egg request, hand over the three requested eggs, and build pity |
| Dr. Scramble’s Mech | A timed boss portal spawns roughly every 30 minutes during the event window | Enter with your strongest bat, clear all three phases, then finish the core-and-tower sequence |
| Extinction Egg | A new limited paid egg sits in the Featured shop with six base outcomes and a rare Skeletal variant | Buy a bundle with Robux if you want it — it’s fully separate from the free Mech and Lab progression |
None of these three systems overlap with each other. You can ignore the Extinction Egg entirely and still walk away with everything the free progression offers, which is worth knowing before you spend anything.
How to Fight Dr. Scramble’s Mech (Step by Step)
The Mech portal is easy to miss the first time it spawns, since it only appears on the map for a few minutes at a time before the fight window closes. During testing across several portal spawns, the timing held steady at roughly every 30 minutes, so it’s worth checking the map the moment you hear the event’s audio cue rather than waiting for a visual confirmation.
Bring any bat to enter — that requirement hasn’t changed from earlier Dr. Scramble encounters — but a higher-damage bat noticeably shortens the fight, since the Mech is reported to carry around 13,300 HP across its full sequence. That figure comes from community damage tracking rather than an official stat sheet, so treat it as a strong estimate rather than a guaranteed number until the developers confirm it directly.
- Enter through the portal with a bat equipped. The fight begins the moment enough players are inside.
- Damage the Mech through its three phases. Focus fire works better here than spreading damage across the group.
- Track the exposed core after the Mech falls. One player gets targeted by the core — that player should lead it toward the small blue tower on the arena’s edge.
- Immobilize the core at the tower, then burn it down. This is the step most groups miss on their first attempt, because it looks like the fight already ended when the Mech’s body disappears.
- Follow Dr. Scramble and land three hits. This final phase closes out the encounter and triggers the reward payout.
Skipping the core-and-tower step is the single most common reason players walk away from a “completed” Mech fight with zero Samples. The robot falling is the midpoint, not the finish line.
Does Every Mech Kill Give the Same Reward?
No — every clear pays out Samples and one point of Boss Mastery, but the real prizes sit behind kill milestones rather than a per-fight roll.
| Milestone | Reward |
| Every Mech clear | Samples + 1 Boss Mastery point |
| 90 kills | Biohazard Egg and Scrambled Unstable Egg |
| 100 kills | Pink Dragon Experiment #010 — an Eternal-rarity pet tagged OP |
That last reward is a genuinely strong one to chase. Eternal-rarity pets are rare enough in Steal an Egg that most of the roster still sits below that tier — the Eternal Gorilla King is one of the only other Eternal pets most players will have seen before this update, so a guaranteed Eternal from a milestone rather than a random hatch is unusually generous.
How Dr. Scramble’s Lab Replaces the Rift Trade-In Machine
The Lab sits in the lobby next to the Shop, in the exact spot the old Rift event‘s trade-in altar used to occupy. The core difference is what it accepts: the old machine wanted hatched pets, while the Lab wants three specific unhatched eggs, decided by whichever banner is currently active.
The Lab currently rotates through three banner pools:
| Banner Pool | Displayed Chance |
| Biohazard Pets | 42% |
| Experimental Pets | 36% |
| Unstable DNA | 22% |
Each banner posts a live request for three named eggs — something like a Cosmic Gorilla Egg, a Centapede Egg, and a Mantaris Egg, though the specific combination changes with the countdown, so don’t treat any single screenshot as a fixed recipe. You submit the three requested eggs directly, without hatching them first, and the Lab hands back an experimental pet result while advancing a 100-point pity bar. Hit pity, and you’re guaranteed the banner’s top-tier reward instead of a random roll from the top pool. Two free rerolls are also built into the screen, so if the current request doesn’t match eggs you actually have on hand, check the reroll option before you submit anything you’d rather keep.
Do I Need to Hatch Eggs Before Using the Lab?
No — this is the one detail that trips up players coming from the old system. The Lab takes unhatched eggs directly. Hatching first and trying to trade the resulting pet won’t work; the submission slot is built for raw eggs only.
Is the Extinction Egg Worth Buying?
The Extinction Egg lives in the Shop’s Featured tab, completely separate from the Lab and the Mech loop. There’s no boss kill or Lab submission tied to it — it’s a straightforward Robux purchase, and the current sale runs through October 10, 2026.
| Bundle | Price |
| 1 Extinction Egg | 99 Robux |
| 3 Extinction Eggs | 249 Robux |
| 10 Extinction Eggs | 799 Robux |
| 50 Extinction Eggs | 3,499 Robux |
Each egg produces one of six base extinct-animal pets, with a separate rare chance to reroll into a Skeletal version of that same animal. The exact drop percentages for the base six or the Skeletal reroll haven’t been published anywhere official as of this writing, so any specific odds you see quoted elsewhere should be treated as unconfirmed community estimate rather than a locked rate. If you’re weighing whether to spend, it’s worth remembering the Extinction Egg contributes nothing toward Boss Mastery or Lab pity — it’s a purely cosmetic-and-collection purchase layered on top of the free content, not a shortcut through it.
When Does Dr. Scramble’s Revenge Actually End?
The live invasion — meaning the Mech portal spawning on a timer and the heightened drone activity that came with it — is scheduled to close at noon ET on September 27, 2026, roughly 25 hours after it opened. That’s the part of the event that’s genuinely time-limited.
What doesn’t disappear with it is the Lab itself. The banners, the pity bar, and the egg-submission system are built to replace the old trade-in machine permanently, not just for the event weekend, so there’s no rush to dump every egg you own before a countdown hits zero. The Extinction Egg’s Featured-shop listing runs on its own separate clock through October 10, 2026, which gives a wider window than the live invasion for anyone still deciding whether the Robux purchase is worth it.
Fastest Way to Clear the Update 6 Loop
Start by opening the Lab and writing down its current three-egg request before you do anything else — that request rotates, and there’s nothing worse than farming the wrong egg for twenty minutes because you were going off memory. From there, keep an ear out for the Mech portal every half hour and treat your strongest available bat as mandatory gear, not an optional upgrade, since a weak bat can stretch a single Mech fight long enough that your group runs out of time before the core-and-tower sequence.
This whole sequence traces back to the setup Dr. Scramble first put in motion during the earlier Dr. Scramble Event, where destroying his drones for Samples and repairing the vault’s lost parts unlocked the original Scrambler rewards and set up everything Update 6 builds on. Anyone who already worked through Nibbles’ escaped-experiment questline or picked up an Experiment #001 Egg from that earlier Experiment Shop will recognize the same currency loop here, just aimed at a bigger boss. Dr. Scramble’s actual Laboratory is where all of this now converges, and it’s not the doctor’s first attempt at a comeback — he’s been building toward this since the chaos he caused back in Update 4, after his plan to control Sammy fell apart and left him targeting Ben instead. Steal an Egg has moved fast through its recent updates, and Update 6 is easily the most mechanically dense one of the batch so far.