How do i reset leaderstats on certain player?

1. We don't know your code for your leaderboard script. 2. You should have everything that deals with leaderstats done on the Server, and only have the Client as for the current stats. Don't change anything from the Client. Only the Server.

If you didn't mess with things and FilteringEnabled is on, hackers won't be able to do that, I've tried this myself (I exploit ONLY to work on the security of my own games, NOT for wrongdoing) and I was able to change the leaderstats values, but they only are like that on the client, no one else can see it.

You also can't go past 2.1 billion if you're using IntValues. If you're using NumberValues, that goes a long way.