What Extinction eggs are
The Extinction egg is a Robux-only egg pack in Steal an Egg, themed around prehistoric animals. You buy it from the egg shop in batches, place the eggs in your pen like any stolen egg, wait for them to grow (or use Grow All) and open them. It's the only source of the Sabertooth divine and the much rarer Skeletal Sabertooth, which is why so many players are tempted by it.
We've opened Extinction eggs in small batches of ten and fifty and, on one very expensive night, in a run of about 650. This guide covers the odds the shop shows, what each pull is actually worth, how much it costs and whether we'd do it again.
The Extinction egg odds
The shop lists these chances for every egg you open:
| Pull | Chance | Typical income from our pulls |
|---|---|---|
| Rat | 39% | worth selling |
| Chicken | 24% | worth selling |
| Giant Sloth | 18% | worth selling, even big ones |
| Shark | 11% | up to about $2.1B per second |
| Gigantis (giant ape) | 6.5% | about $1.7B to $1.8B; a rainbow one made $10B |
| Sabertooth | 0.5% | $8B per second unmutated |
| Skeletal reroll | 1% | never seen |
Two things stand out. First, 81% of the pool is filler: rats, chickens and sloths you'll sell straight away. Second, the useful pulls are the Shark and the Gigantis at a combined 17.5%, which means about one egg in six is something that can go in a mid-game pen.
How the skeletal reroll works
The listing says 1% for the skeletal reroll, but in our run of roughly 650 eggs we never saw one. If it were a plain 1% pull, we'd have expected about six. Our reading is that the reroll applies to the Sabertooth itself: you first need the 0.5% Sabertooth, then a 1% chance it turns skeletal. That puts the Skeletal Sabertooth at roughly 1 in 20,000 eggs. We'll update this page if a reroll ever turns up on a non-Sabertooth pull.
How much Extinction eggs cost
Fifty Extinction eggs cost 2,800 Robux on a normal account, about 56 Robux per egg. Some regions see cheaper prices, and we've paid around 2,700 for fifty on a discounted account. Buying ten at a time doesn't change the odds; it only changes how often you click.
Here's the cost math for each pull, using 56 Robux per egg:
- A Shark or better (18% combined): about one every 5.5 eggs, so roughly 310 Robux each.
- A Gigantis or better (7%): about one every 14 eggs, roughly 800 Robux.
- A Sabertooth (0.5%): one every 200 eggs on average, about 11,200 Robux.
- A Skeletal Sabertooth (~0.005%): one every 20,000 eggs, well over a million Robux on paper.
That last line is why we tell everyone the same thing: don't buy Extinction eggs for the skeletal version. Buy them, if at all, for the Sharks, the Gigantis and a shot at a normal Sabertooth.
What our 50-egg batches gave
Our first small run was a disappointment. Fifty eggs gave one red egg that suddenly ballooned in size and hatched into a pet worth $2.9 billion, and the rest was filler. About 2,700 Robux for one useful pet. That's a realistic result for a single batch, and it's the reason we'd never recommend fifty eggs as a one-off purchase.
Another batch of fifty went better. We got a Sloth on the first open, then rats and chickens, then two Sharks around $2.1B and two Gigantis around $1.8B, including a silver one. On an account whose best pet had been a $215 million brainrot, that one batch jumped the pen into the billions.
What about 650 eggs?
On our big run we bought enough for about 655 eggs and opened them in waves of around fifty, placing a full pen, using Grow All and opening everything at once. (Be warned: opening that many eggs at once makes the game lag badly.)
- Our first Sabertooth arrived after about 70 eggs, at $8 billion per second, with a glowing aura.
- A second came a few waves later, and a third shortly after that.
- We pulled well over a dozen Gigantis, including a rainbow Gigantis at $10 billion, and so many Sharks that we stopped keeping them.
- The whole pen ended at about $55 billion per second.
- No skeletal reroll, and no Skeletal Sabertooth.
Three Sabertooths in roughly 600 opened eggs is almost exactly what a 0.5% chance predicts, so the listed odds look honest. It's also a reminder of how much luck matters in smaller runs: someone who buys 200 eggs has about a 63% chance of seeing at least one Sabertooth, not a guarantee.
Tips if you do buy them
- Buy during an Admin Abuse with 2x egg size. Every egg comes out bigger, and size multiplies income. The same Sabertooth is worth far more from a giant egg.
- Open in full-pen waves. Clear your pen, place as many eggs as fit and use Grow All once instead of paying for instant hatches one by one.
- Keep the big ones, sell the rest. A Shark under $1 billion isn't worth a pen slot in the late game. Check each pull and sell filler immediately.
- Save your mutations. If a Sabertooth lands, it's a great target for Scrambled, Enchanted or Nitro. Follow the order in our mutation strategy guide.
Should you buy Extinction eggs?
For most players, no. The same 2,800 Robux buys a big part of the speed multiplier ladder or the 2x Money pass, both permanent and both useful for every egg you'll ever steal. A batch of fifty is a gamble with a likely outcome of one or two decent pets.
They make more sense in two cases. If you're early in the game with a weak pen, a batch can jump-start your income faster than anything else Robux can buy. And if you already own every permanent upgrade and enjoy gambling, a big run during a 2x size event is a fun way to fill a pen with billion-dollar pets.
Just don't do it for the Skeletal Sabertooth. We opened about 650 eggs and never saw one. For the full list of what's worth your Robux, read the Robux spending guide, and for more on the Sabertooth line, see the Skeletal Sabertooth page and the eggs page.