How can I set everyone's leaderstats amount to 0? [closed]

Edit: Isn't in game means you have data store and you want to wipe the saved data? No you can't only if you use RemoveAsync() - You would need to know the key or you can just change name of the data store (Bad way).

I assume it's in leaderstats folder which is inside of the player? You can use Players:GetPlayers() function which returns table of all players that are in the game. Simply get the Players service and fire the function it:

local Players = game:GetService("Players")

local AllPlayers = Players:GetPlayers()

Now you would have to run loop for the table, pairs loop to be exact. It loops through table and returns 2 variables, it's index in the table (In this case number position of the Player in the table) and the value assigned to it (In this case Player Instance):

for Index, Player in pairs(AllPlayers) do
    print(Index, Player)
end

Now this is example to fully show what it does, if for example in game there were 3 players, Bob, Mariah and WideSeal, this would be the output:

[1] Bob
[2] Mariah
[3] WideSeal

So as i said before, i assume every player has leaderstats folder and kills value in it so in your case you would just change the value to 0:

for Index, Player in pairs(AllPlayers) do
    local Leaderstats = Player.leaderstats -- the leaderstats folder
    local kills = leaderstats.kills -- the kills value

    kills.Value = 0
end

And that's it. Don't accept if it didn't help.