Mutations & Sizes
The official Roblox game page says players can discover mutations, but it does not publish their rates or multipliers. This page lists each documented income scalar and how mutation bonuses combine. Use the income calculator to turn these scalars into a Money/s breakdown without treating unknown odds as facts.
Color mutations
Rolled on hatch or applied by event items; each scalar adds its bonus above the base ×1.
Rainbow
×5A color mutation supported by the calculator's current community-rule setting (×5). Conflict logged: Eldorado.gg's dedicated Aug 26 guide lists ×2.5, while the earlier stealanegg.pro table said ×5 — no official number exists. Kept at ×5 for calculator continuity until a second source agrees.
Income scalar from the documented source above — not a developer-published rate.
Fractured
×2.75Rift Update (September 2026) mutation: applying the Boss Shop's Mutation Consumable (400 Boss Tokens, in-game screenshot) to an unhatched egg gives a reported 10% chance for that egg to hatch Fractured — an application chance, not a hatch roll. The community wiki lists ×2.75 income; a minority of guides read the consumable as a flat +10% money boost instead, and the wiki's multiplier scale differs from other community listings (e.g. Golden ×2.5 vs Eldorado's ×2), so ×2.75 stays a single reported reading.
Income scalar from the documented source above — not a developer-published rate.
Golden
×2A color mutation supported by the calculator's current community-rule setting (×2). Eldorado.gg's Aug 26 guide also lists ×2. Roll rate not published.
Income scalar from the documented source above — not a developer-published rate.
Silver
×1.25Color mutation documented by Eldorado.gg's mutations guide (Aug 26, 2026) at ×1.25 income — the weakest documented roll, obtainable from egg spawns and Admin Abuse events. Roll chance not published.
Income scalar from the documented source above — not a developer-published rate.
Monstrous
×?Monster Update mutation that arrives pre-applied on the Monstrous Egg — the 1.5% Monster Chest jackpot pull (IGN, Aug 29). Multiplier and whether it can roll on any other egg are undocumented.
Income multiplier not yet verified — contributes no bonus in the calculator.
Scrambled
×?Dr. Scramble's Experiment Shop sells a Scrambled Mutation Consumable for 475 Samples. It is applied to an eligible unhatched egg. Public guides conflict on the application chance (1% versus 10%), and no reliable first-party multiplier tooltip is available, so both success rate and income multiplier remain Unknown.
Income multiplier not yet verified — contributes no bonus in the calculator.
Legacy incubator mutations
Legacy mutations from the ended Great Bloom / Sakura Event — no longer obtainable, but existing pets keep them and their scalars still apply.
Spirit BloomLegacy
2.5% of rollsThe rare incubator result — about 2.5% of rolls, but guaranteed when the Sakura Incubator was charged to 150% before mutating the egg. The Great Bloom / Sakura Event has ended, so Spirit Bloom can no longer be obtained; pets that already carry it keep it, and it still applies its income scalar. The client-config mirror (v473, internal name "GreatBloom") lists ×2.5, superseding Eldorado.gg's earlier single-source ×3 listing.
Income scalar ×2.5 (client-config mirror, not developer-published) — still applies to pets that carry it.
BloomLegacy
97.5% of rollsSakura-themed mutation applied to an egg by the Sakura Incubator (Update #1) once it reached 100% charge — not a hatch roll. About 97.5% of incubator results landed Bloom. The Great Bloom / Sakura Event has ended, so Bloom can no longer be obtained; pets that already carry it keep it, and it still applies its income scalar. The client-config mirror (v473, internal name "Sakura") lists ×1.25, superseding Eldorado.gg's earlier single-source ×1.5 listing.
Income scalar ×1.25 (client-config mirror, not developer-published) — still applies to pets that carry it.
The Great Bloom / Sakura Event has ended, so neither mutation can be obtained anymore. The Sakura Incubator reference documents the historical Crane unlock, Great Bloom crystal loop, and the difference between 100% and 150% charge.
Sizes
Documented size mutations — the income calculator now derives size from the pet's weight, not fixed categories.
Giant
reported ×3Significantly larger model. Community sources report it triples both cash and speed stats — a hybrid income + escape tool. The income calculator derives size from the pet's measured weight through a nonlinear scale curve instead of this fixed multiplier.
Community-reported value. Calculator income follows measured pet weight through a nonlinear scale curve — not a fixed Giant multiplier.
Tiny
×1Smaller model. No income multiplier; community sources report faster hatch utility. Niche value for incubator sessions.
Community-reported value. Calculator income follows measured pet weight through a nonlinear scale curve — not a fixed Giant multiplier.
Stacking table
Mutation bonuses add above the base ×1; they do not multiply together.
| Combination | Mutation factor | Note |
|---|---|---|
| Plain pet | ×1 | |
| Silver | ×1.25 | |
| Golden | ×2 | |
| Rainbow | ×5 | |
| Silver + Golden | ×2.25 | |
| Golden + Rainbow | ×6 | |
| Silver + Golden + Rainbow | ×6.25 | bonuses add above ×1 — not a straight multiplication of scalars |
| Fractured (Rift) | ×2.75 | 10% chance via the Boss Shop's Mutation Consumable (reported) |
| Bloom (legacy) | ×1.25 | ended Great Bloom / Sakura Event |
| Spirit Bloom (legacy) | ×2.5 | ended Great Bloom / Sakura Event |
| Monstrous | — | income multiplier not yet verified |
| Scrambled | ×1 | 475 Samples consumable; application chance 1% vs 10% conflict |
Formula: Mutation Factor = 1 + Σ(Scalar − 1). Example: Golden + Rainbow = 1 + (2−1) + (5−1) = ×6 — not ×10. Weight-based size scaling is a separate layer handled in the income calculator.
About the odds
Why no percentages are shown.
FAQ
How do mutations work in Steal An Egg?
The official Roblox game page confirms that the experience has mutations. This site documents each mutation's reported income scalar (Golden ×2, Rainbow ×5, Silver ×1.25, Fractured ×2.75) and stacks them additively in the calculator: each mutation adds its bonus above the base ×1 rather than multiplying. No first-party multiplier table has been published, so every scalar stays a sourced estimate.
What is the Fractured mutation in Steal An Egg?
Fractured is the Rift Update's exclusive mutation. Applying the Boss Shop's Mutation Consumable (400 Boss Tokens) to an unhatched egg gives a reported 10% chance for that egg to hatch Fractured, and the community wiki lists it at ×2.75 income. Some guides instead read the consumable as a flat +10% money boost; the wiki's chance reading matches the item's 10% badge. Like every scalar here, ×2.75 is a sourced community estimate, not a developer-published number.
What is the Bloom mutation in Steal An Egg?
Bloom is a legacy mutation from the ended Great Bloom / Sakura Event: an independent Sakura Incubator guide reported it was applied to an egg at 100% charge (about 97.5% of results), with a Spirit Bloom guarantee at 150%. Both mutations can no longer be obtained, but pets that already carry them keep them and their income scalars still apply — the client-config mirror lists Bloom at ×1.25 and Spirit Bloom at ×2.5 (internal names "Sakura" and "GreatBloom"), superseding the earlier single-source community listings.
What is the Scrambled Mutation in Steal An Egg?
Scrambled is a Dr. Scramble Experiment Shop consumable listed at 475 Samples for an eligible unhatched egg. Public guides conflict on the application chance (1% versus 10%), and its income multiplier is not verified, so the calculator applies no guessed bonus. See the dedicated Scrambled detail page for the evidence boundary.
What are the chances of hatching a Golden or Rainbow pet?
Not published. Community consensus is that Golden is the most common roll, Rainbow the rarest, and Giant/Tiny uncommon in between. Any exact percentage you see online is an estimate.
Do Golden and Rainbow multiply together?
No — the calculator stacks mutation bonuses additively above the base ×1: Golden + Rainbow = 1 + (2−1) + (5−1) = ×6, not ×10. Size is handled separately: income follows the pet's measured weight through a nonlinear scale curve instead of a fixed Giant multiplier.
Do mutations help me progress to new biomes?
The official Roblox game description connects pet earnings, treadmill training, base upgrades, and Speed progression. Any claimed Giant-specific Speed effect remains unverified in this site’s current source set.