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Update

Radioactive Mutation — Update 25

By RBLXGUIDE Editorial TeamSaturday, November 15, 20253 min read
Reviewed byMatLumber

Quick Summary

Update 25 goes nuclear: a Radioactive event with 8x multiplier, Brainrot Trader NPC, hourly Fishing events, Aquatic Index collection, and a new Rebirth level.

What's New

New Radioactive event and mutation (8x multiplier)
New Radioactive event and mutation (8x multiplier)
Brainrot Trader NPC — exchange brainrots with an NPC
Hourly Fishing event — fish for rare brainrots
Aquatic Index collection — catch all fish types
New Rebirth level unlocked

Key Takeaways

  • Traits multiply your Brainrot's base income per second
  • Mutation drops are rarer but give bigger multipliers
  • Higher-rarity Brainrots have better trait roll odds
  • Re-rolling is worth it for Legendary+ Brainrots