Mutations are the single biggest income multiplier in Steal a Brainrot. After Update 47, the Cyber mutation became the new ceiling at 11x — but it's not the only path to top-tier earnings. This guide ranks all 14 mutations by raw multiplier AND practical accessibility, so you know where to spend your time.
Tier S+ (10x+ multiplier)
| Mutation | Multiplier | How to Get | Status |
|---|---|---|---|
| Disco | 12x | Datamined, not yet released | Coming May/June 2026 |
| Cyber | 11x | Cyber Craft Machine + windowed event | Active now |
| Rainbow | 10x | 1% conveyor spawn during Rainbow Machine event | Permanent |
| Divine | 10x | Divine event window | Limited |
If Disco hasn't dropped yet, Cyber is your top target. The Cyber Craft Machine plus the published event windows make Cyber the only 10x+ mutation you can reliably plan around.
Tier A (8-9x)
| Mutation | Multiplier | How to Get |
|---|---|---|
| Cursed | 9x | Cursed event window |
| Radioactive | 8.5x | Radioactive event window |
These are rare-event mutations. They appear once or twice per month. If you don't have at least one mid-tier Secret to mutate, skip them — the bonus is small on a low-base brainrot.
Tier B (6-7.5x)
- Yin Yang (7.5x) — Yin Yang event
- Galaxy (7x) — Galactic event
- Lava (6x) — Molten event
Mid-tier events run roughly weekly. They're the ideal first 6x+ mutation if you're new to the mutation grind.
Tier C (Below 6x)
- Candy (4x) — Candy Aurora event
- Bloodrot (2x) — Bloodmoon event
Don't waste effort on these once you have any Tier A/B mutation. They're worth chasing only on brainrots you've already filled with traits.
Tier D — Permanent / Conveyor
| Mutation | Multiplier | Spawn Rate |
|---|---|---|
| Diamond | 1.5x | 20.4% on conveyor |
| Gold | 1.25x | 10% on conveyor |
| Default | 1x | Standard spawn |
These appear naturally during regular play. Don't actively chase them — they're transitional.
Cyber vs the Field
The single most important question: how much real income does Cyber save you? On a Digi Narwhal:
| Mutation | Income/s |
|---|---|
| Default 1x | $3.2B/s |
| Diamond 1.5x | $4.8B/s |
| Galaxy 7x | $22.4B/s |
| Rainbow 10x | $32B/s |
| Cyber 11x | $35.2B/s |
The gap from Rainbow to Cyber is "only" 10%, but compounded across 5+ stacked Secrets that's billions per minute extra income.
Strategy Summary
- Cyber is the must-chase mutation — the Cyber Craft Machine makes it the most reliably-obtainable top-tier mutation in game history
- Rainbow is the fallback if you can't time Cyber windows — it spawns naturally on the conveyor
- Divine is admin-abuse only; treat as bonus, not as a goal
- Skip everything below 6x once you have a confirmed Cyber mutation pipeline running
