While this isn't strictly a "free private server," it functions identically—only your group members can join. Since creating a Roblox group is , you’ve effectively created a long-term private server for $0.
You can often find active, free-to-use private server links through dedicated community hubs: Rise of Nations Roblox Rise Of Nations Free Private Server
: Create custom countries (like "Oceania") with unique flags and colors for roleplay or specialized combat scenarios. Key Limitations It is important to note that progress made in private servers is limited While this isn't strictly a "free private server,"