If you want to play with a specific group of friends, the simplest and safest method is to use Roblox's official private server system. Buy a private server for your game, share the access code, and have your friends join using the official link format.
The client needs to query this MemoryStore to populate the list. Roblox SERVER BROWSER SCRIPT
Regardless of your chosen path, safety should always come first. The search results highlighted several critical risks and best practices. If you want to play with a specific