All mutations & multipliers
| Mutation | Multiplier | Rarity | Earnings boost | Notes |
|---|---|---|---|---|
| Gold | 1.5× | Common | +50% | The most frequent mutation; a small but free earnings boost. |
| Diamond | 2× | Uncommon | +100% | Doubles base Brainrot earnings. |
| Plasma | 4× | Rare | +300% | Where mutation rolls start meaningfully accelerating your run. |
| Molten | 6× | Epic | +500% | Strong end-game-grind multiplier. |
| Radioactive | 8× | Rarest | +700% | Documented in upstream guides as "the best mutation in the game". |
The five tiers are consistent across the public Mutations guides we sourced. Only one mutation can apply per Brainrot — there is no stacking inside a single roll.
How mutations actually trigger
When you kick the Lucky Block, the game performs the rarity roll for the Brainrot first, then a mutation roll on top. Five known levers raise the odds of the second roll landing on a mutated outcome:
- Perfect kicks. Hitting a clean kick (the in-game timing window) grants a small luck boost on that roll. Treat it as a small but free edge — not a strategy in itself.
- Global luck events. The server periodically announces a luck event with a 2×, 4× or 8× mutation chance multiplier for everyone in the server, lasting around five minutes. When one fires, drop everything and kick as much as your stamina allows.
- Mutation Luck gamepass. A 139-Robux gamepass that permanently doubles your mutation chance. See the game passes page for the full pass effect and our take on whether it's worth the spend.
- Higher Kick Power. Stronger kicks reach rarer zones, which roll rarer Brainrots; mutations stack on top of those rolls, so a Radioactive on a high-rarity Brainrot is dramatically more valuable than a Radioactive on a Common.
- Run Speed. Faster legs save more rolls from the tsunami — every Brainrot you actually claim is a Brainrot whose mutation can earn for you.
What we don't know
The exact base mutation probability is not publicly documented. Multiple upstream guides explicitly say the underlying odds are unknown. We treat the multipliers as confirmed and the probabilities as undocumented; if a number gets posted by the developer or extracted from datamining, we'll add it here with a source.
Mutation strategy by progression stage
Early game (Common → Rare zones)
- Don't change your routine to chase mutations. Volume of kicks > mutation hunting.
- If a global luck event fires, that is your cue to spam kicks for five minutes.
- Keep upgrading Run Speed so you don't lose the rare mutated rolls you do get.
Mid game (Epic → Mythic zones)
- Diamond / Plasma start landing more frequently because you spend more total time in the world; place mutated Brainrots first when plot space is tight.
- Consider the Mutation Luck pass once you can comfortably play 30 minutes per day; the doubled chance compounds nicely with your zone tier.
Late game (Godly → Hacked zones)
- Replace plot Brainrots aggressively. A Radioactive Godly out-earns ten older Diamond Rares.
- Time your kicks around global luck events — that is where the per-hour income spikes happen.
- Stack rebirth multipliers on top of mutation multipliers for the steepest curve.