The best way to experience Roblox Fisch is to do so on a private server. That way, you don't have to deal with random people who will try to annoy or lecture you with unnecessary advice or tips, or ...

ClientSimulator is a performance-focused Roblox system designed to handle massive amounts of floating or ambient objects (like fireflies, particles, or bounce balls) — simulated entirely on the server ...

The Steal A Brainrot Private Server Guide provides you with a lot of free links along with instructions on how to use it properly.