Move as much logic as possible to ServerScriptService . Keep your client-side LocalScripts lightweight and focused purely on rendering visual effects and UI inputs.
Whether you are a developer looking to recover lost assets, a researcher analyzing game mechanics, or curious about how games are built, understanding SaveInstance is key. What is a SaveInstance Script? Roblox SaveInstance Script
Any standard Script running on the server ( ServerScriptService or ServerStorage ) is completely invisible to the client. Move as much logic as possible to ServerScriptService
The "proper" story of SaveInstance is also one of technical limitations. Because of Roblox's (FE) system, a SaveInstance script can only save what the player can see. It grabs the maps, the parts, and the LocalScripts . It cannot grab ServerScripts . What is a SaveInstance Script
Smart developers have learned to fight back not by blocking the save, but by making it useless. They move critical game logic to the server and use to only send tiny chunks of the map to the player at a time. This way, if someone runs a SaveInstance script, they only end up with a fragmented, broken puzzle instead of a finished masterpiece.
In 2020–2024, Roblox sued multiple exploit creators (e.g., "Meme City" case) for enabling mass game theft.