GPT
Claude
Grok
The Fuse Machine is one of the main features in Steal a Brainrot, letting you combine four Brainrots into a brand new one, with a chance of getting a higher rarity than what you put in. It originally launched in August 2025, got removed in September, and came back on January 24, 2026, with new Mythic to Secret tier Brainrots added on top of the returning ones. In this article, we'll cover everything you need to know about the Fuse Machine, including how to use it, fuse times, how rarity works, and all the Brainrots you can get from it.
How to Use the Fuse Machine
The Fuse Machine is located next to the Coins Shop in the middle of the map. To use it, grab a Brainrot from your base by holding the E key on PC or tapping the button on mobile, then walk up to the Collect Zone in front of the machine to submit it. Repeat this until you have submitted four Brainrots, then press E on the machine to open the Fuse Brainrots menu. It will show you the possible rewards, the waiting time, and the cash required. If you're happy with the results, pay the cash and start the fusion.
The fuse time depends on the highest rarity Brainrot you put in. Common, Rare, or Epic inputs take 15 minutes, Legendary, Mythic, or Brainrot God take 30 minutes, and Secret or OG take 1 hour and 30 minutes. Once the timer is done, the fused Brainrot will appear in your base. If you don't want to wait, you can spend 299 Robux to reveal and claim the reward early.
As for how rarity works, the machine averages the rarities of your four inputs to determine your Dominant Rarity, which is what your result will usually be. You always have at least a 10% chance to get a Brainrot one rarity higher than that. Your fused Brainrot also has a 10 to 20% chance to inherit any traits or mutations from your inputs, and that chance increases if multiple inputs share the same trait.
Also Read: How to Rebirth in Steal a Brainrot
Where to Find New Fuse Machine Brainrots
The Fuse Machine gets updated regularly, with new Brainrots added and sometimes existing ones swapped out. The best place to stay on top of this is the official Steal a Brainrot Discord server, where the developer SpyderSammy announces changes first, usually during Taco Tuesdays or special events like Admin Abuse sessions.
You can also follow the developers on the official Roblox group page, where they post updates and community announcements. Turning on notifications for both is the best way to make sure you don't miss a new Brainrot or a limited-time fuse event, since some of them come and go without much warning.
Tips Before You Fuse
The most important thing to know is that fusion is permanent. Once you submit your four Brainrots and start the process, you're not getting them back, so make sure the possible outcomes are worth it before you commit.
Avoid mixing high-rarity Brainrots with low-rarity ones. If you put in three Secrets and one Common, the low-rarity input drags the average down, and you'll end up with a much worse result than if you had used four inputs of the same rarity. Always try to keep your inputs as close in rarity as possible.
Use Brainrots you don't need rather than your best ones. This also frees up base space and keeps your valuable Brainrots safe from being stolen while they're sitting on your base. If you're looking to trade Brainrots instead, that's another option worth considering before committing to a fuse.
If you're on a public server, try to fuse in one where other players have less money than you. That way, they won't be able to buy your freshly fused Brainrot before you can claim it. A private server is the safest option if you have access to one.
Also Read: How to Get Limited LA Jolly Grande in Steal a Brainrot
Final Words
The Fuse Machine is one of the best ways to get higher-rarity Brainrots, but it requires some thought before you commit. Keep your inputs close in rarity, use Brainrots you don't need, and follow the official Discord and Roblox group so you never miss a new update or limited-time fuse event.
