Please do not trust free robux games. They don't really give you free robux. Within a day of typing your ROBLOX username and PW in one of those games, they will have your account stolen. Then, they will sell it to people on other places.
Please read this helpful article by ROBLOX on account theft: https://en.help.roblox.com/hc/en-us/articles/203313380-Account-Security-Theft-Keeping-your-Account-Safe- Besides that, please keep your account safe from predators and scammers. Thank you!