Roblox Studio Advanced Scripting Tips 2026

Move past your first working script with five Luau habits that keep a growing Roblox game secure, readable, and easy to change: ModuleScripts, server authority, validated RemoteEvents, the task library, and a single entry point per side.

You already have a script that works. Maybe it is a coin collector, maybe a door that opens on touch. The next problem is not making things work. It is keeping them working once you have thirty scripts, two people playing, and one person trying to cheat.

This guide assumes you can insert a Script, read the Output window, and connect an event. Everything here is about structure and trust, not syntax.

Tip 1: Put logic in ModuleScripts, not in loose Scripts

A ModuleScript is a script that runs once, the first time something calls require on it, and hands back a single value. That value is usually a table of functions. Every later require of the same module returns the same table, so modules are a natural place for shared state and shared code.

The rule of thumb is simple. Scripts and LocalScripts should be thin. ModuleScripts should hold the real work.

Where you put a module decides who can see it:

• ServerScriptService or ServerStorage: server only. Put game rules, rewards, and anything to do with currency here.
• ReplicatedStorage: copied to every client. Put shared constants, pure helper functions, and the RemoteEvents both sides need.

Roblox’s security guidance points out that anything replicated to the client can be read by an exploiter, including ModuleScripts that never run there. Never put secret logic or reward formulas in ReplicatedStorage just because it is convenient.

A shared config module might look like this:

-- ReplicatedStorage/Shared/Config (ModuleScript)
local Config = {}

Config.HEAL_AMOUNT = 25
Config.HEAL_COOLDOWN = 5
Config.HEAL_RANGE = 12

return Config

Both the server and your client UI can now read the same numbers, and you change them in one place.

Tip 2: Treat the client as a request, never as the truth

Every Roblox game runs on a server, with each player’s device as a client. The Creator Hub is direct about what an exploiter can do on their own client: change their local copy of the game, run their own code, and fire your RemoteEvents as often as they like with any arguments they choose. The only thing they cannot fake is the first argument the server receives, which is the Player who sent it.

That leads to one habit. The client asks. The server decides.

A healing station is a good example. The wrong design is a LocalScript that sets the character’s health when the player presses a button. The right design is:

1. The client fires a RemoteEvent that says “I would like to heal at this station.”
2. The server checks whether that is allowed.
3. The server changes health, which then replicates to everyone.

The client never sends the heal amount. The server already knows it from Config.

Tip 3: Validate every RemoteEvent on the server

Create a RemoteEvent in ReplicatedStorage and name it after its job, such as RequestHeal. On the client, a LocalScript calls FireServer. On the server, you connect to OnServerEvent.

Here is a server module that does the checks the Creator Hub recommends: argument types, sensible values, the player’s state, distance, and a per-player cooldown.

-- ServerScriptService/Services/HealService (ModuleScript)
local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Config = require(ReplicatedStorage.Shared.Config)

local HealService = {}
local lastHeal = {}

local function onRequestHeal(player, station)
    -- 1. Type and identity: is this one of our stations?
    if typeof(station) ~= "Instance" or not station:IsDescendantOf(workspace.HealStations) then
        return
    end

    -- 2. Player state: alive, with a character
    local character = player.Character
    local humanoid = character and character:FindFirstChildOfClass("Humanoid")
    local root = character and character:FindFirstChild("HumanoidRootPart")
    if not humanoid or not root or humanoid.Health <= 0 then
        return
    end

    -- 3. Range: the server measures, not the client
    if (root.Position - station.Position).Magnitude > Config.HEAL_RANGE then
        return
    end

    -- 4. Cooldown: tracked on the server only
    local now = os.clock()
    if lastHeal[player] and now - lastHeal[player] < Config.HEAL_COOLDOWN then
        return
    end
    lastHeal[player] = now

    humanoid.Health = math.min(humanoid.Health + Config.HEAL_AMOUNT, humanoid.MaxHealth)
end

function HealService.init()
    ReplicatedStorage.Remotes.RequestHeal.OnServerEvent:Connect(onRequestHeal)
    Players.PlayerRemoving:Connect(function(player)
        lastHeal[player] = nil
    end)
end

return HealService

Notice what is not trusted. The station could be any object, so the script checks it lives in your HealStations folder. The distance is measured by the server. The cooldown lives in a server table that the client cannot touch. When a check fails, the function returns quietly instead of throwing an error.

Also notice the cleanup on PlayerRemoving. Any per-player table you keep on the server should be cleared when that player leaves, or it slowly fills with entries for people who are gone.

The same thinking applies to things that are not remotes. The security docs warn that exploiters can trigger touch events and ProximityPrompt activations from any range or at any rate, so put the same distance and cooldown checks in those handlers too.

Tip 4: Use the task library for timing

When you need to wait or schedule work, reach for the task library. The Creator Hub reference lists these functions:

• task.wait(duration) pauses the current thread and returns how long it waited.
• task.delay(duration, fn, ...) runs a function after a delay without pausing your code.
• task.spawn(fn, ...) runs a function right away in a new thread.
• task.defer(fn, ...) schedules a function to run soon, instead of immediately.
• task.cancel(thread) stops a thread you scheduled.

A respawning pickup is a clean use of task.delay, because you do not want the whole script to stop while the timer runs:

local function collect(pickup)
    pickup.Transparency = 1
    pickup.CanTouch = false

    task.delay(10, function()
        pickup.Transparency = 0
        pickup.CanTouch = true
    end)
end

One subtle point from the remote events docs: if a handler yields, for example by calling task.wait or WaitForChild, Roblox can start the next message before the first handler finishes. Do your validation and record the cooldown before any yield, so two rapid requests cannot both pass the check.

Tip 5: One entry Script per side

Here is the pattern that keeps scripts small. Instead of dozens of Scripts each doing their own setup, you keep exactly one Script on the server and one LocalScript on the client. Each one just loads modules and starts them.

-- ServerScriptService/Main (Script)
local Services = script.Parent:WaitForChild("Services")

for _, module in Services:GetChildren() do
    if module:IsA("ModuleScript") then
        local service = require(module)
        if service.init then
            service.init()
        end
    end
end

Every feature becomes a ModuleScript in the Services folder with an init function. Adding a feature means adding one module. Removing a feature means deleting one module. You can always answer the question “what runs when the server starts?” by opening one folder.

Do the same on the client with a LocalScript in StarterPlayerScripts that loads client modules, such as one for UI and one for input.

Keep each module focused on one job. If a module grows past what you can read in one sitting, split it. If two modules keep reaching into each other’s tables, move the shared part into a third module that both require.

Bonus: turn on type checking

Luau supports type checking that you control with a comment on the first line of a script. The Creator Hub describes three modes: --!nocheck, --!nonstrict, and --!strict. In strict mode, Studio highlights type mismatches in the Script Editor and lists them in the Script Analysis window.

Try --!strict on new modules first. It catches typos and wrong argument types before you press Play. A Workspace setting controls the default mode; check the Creator Hub type checking page for your Studio version.

Test it the way players will

Solo Play runs a client and a server, but you are only one player. To test remotes and cooldowns properly, use Studio’s Server & Clients test option with two clients. Fire your remote rapidly from one client, stand out of range on the other, and confirm the server ignores both.

Then read your server modules as if you were the cheater. For every OnServerEvent, ask what happens if the arguments are wrong, missing, or sent a hundred times. If the answer is “nothing bad,” the script is ready.