Using these private server codes is different to most Roblox redeem coupons. Since you don’t get anything for free—instead just heading into a closed lobby—the process is slightly more complex.

How To Get More Private Server Codes For Project Mugetsu Private Server is a subscription-based feature in Roblox that allows players to create private servers for games like Project Mugetsu.

You can get one free Shinobi Life 2 server per account on their Roblox page. If you do it in-game though, it will always require you to pay a monthly fee of 800 Robux to make and keep a server up.