If you're tired of seeing your leaderboard ruined by exploiters, it's probably time you started looking into a solid roblox anti cheat script to keep things fair for everyone else. There is nothing more frustrating than spending months building a balanced game only to have someone fly across the map or teleport directly to the finish line within five seconds of joining. It's a common headache for developers on the platform, but honestly, it doesn't have to be a nightmare to fix if you know where to start.
Building an anti-cheat isn't just about stopping people from breaking the rules; it's about creating a stable environment where your actual players feel like their progress matters. Let's be real, if a new player joins your game and sees ten people flying through walls, they aren't going to stick around for long.
Why Client-Side Protection Usually Fails
One of the first mistakes a lot of new developers make is putting their roblox anti cheat script entirely inside a LocalScript. I get why—it seems easier to check things on the player's own computer. But here's the thing: exploiters have full control over their own client. They can see your LocalScripts, they can disable them, and they can even rewrite the logic while the game is running.
If your "anti-cheat" is just a script in StarterPlayerScripts that says if speed > 16 then kick(), an exploiter is just going to delete that script before it even has a chance to run. To actually catch people, you have to move the heavy lifting to the server. The server is the "source of truth." It doesn't care what the player's computer says; it only cares about what it can see and verify itself.
Catching Speed Hacks and Teleportation
Speed hacking is probably the most common exploit you'll run into. Most of these exploits work by changing the WalkSpeed of the Humanoid or manually updating the CFrame of the character. To stop this, your roblox anti cheat script needs to run on the server and periodically check how far a player has moved over a certain amount of time.
The Magnitude Check
The most effective way to do this is using a simple magnitude check. You basically save the player's position, wait a second, and then check their new position. If the distance between those two points is way higher than what should be possible at their max speed, you know something is up.
However, you have to be careful with this. If a player is lagging or has a high ping, they might "rubber band," which can make it look like they moved a huge distance instantly to the server. If your script is too strict, you'll end up kicking innocent players who just have a bad internet connection. It's usually better to give them a "warning" or teleport them back to their previous position instead of an instant ban.
Dealing with Teleporting
Teleporting is basically just speed hacking on steroids. If a player moves 500 studs in half a second, it's pretty obvious they didn't walk there. A good roblox anti cheat script will have a "buffer" system. You allow for a little bit of extra movement to account for things like physics flinging or high latency, but anything beyond that gets flagged.
Keeping an Eye on Remote Events
This is a big one. Most modern Roblox games rely heavily on RemoteEvents to communicate between the client and the server. If you have a RemoteEvent that says "GivePlayerGold," and you don't have any server-side checks, an exploiter can just fire that event 10,000 times a second and max out their stats.
Your roblox anti cheat script shouldn't just be about movement; it needs to be about logic validation. Never trust the client. If the client sends a request to buy an item, the server should check: 1. Is the player close enough to the shop? 2. Does the player actually have enough money? 3. Is the item even available?
If the server just does what the client asks without questioning it, you're basically leaving the front door wide open.
Handling Noclip and Wall Hacks
Noclip is a bit trickier to detect than speed. Exploiters do this by turning off the CanCollide property on their character's parts or by using specific scripts to bypass physics. One way to counter this in your roblox anti cheat script is to use raycasting.
You can cast a ray from the player's previous position to their current position. If that ray hits a wall that is supposed to be solid, you know they just walked through something they shouldn't have. Again, physics on Roblox can be a little wonky sometimes, so you don't want to be too aggressive. Sometimes a player gets stuck in a wall because of a bug, not because they're cheating.
The Problem with Instant Bans
It's very tempting to make your roblox anti cheat script just ban anyone it catches immediately. It feels satisfying to "justice-hammer" a cheater, right? But in practice, this is often a bad move.
First, if your script has a bug (and it probably will at some point), you might accidentally ban your entire player base. Second, instant bans tell the exploiter exactly what triggered the detection. If they get banned the second they turn on a speed hack, they know your script is checking for speed.
Many top-tier developers prefer "Silent Logging" or "Delayed Kicks." This means the script notices the cheating, logs it to a private Discord server or a database, and then kicks the player a few minutes later—or even a day later. This makes it much harder for exploit developers to figure out how your anti-cheat actually works.
Using Community Modules vs. Scripting Your Own
You don't always have to reinvent the wheel. There are some really great community-made tools out there that act as a framework for a roblox anti cheat script. Modules like Chickynoid rethink how character movement works entirely by shifting it to be server-authoritative, which pretty much kills most movement exploits out of the box.
However, using a pre-made script means that exploiters also have access to it. They can study the code and find ways around it. If you write your own custom logic, even if it's simple, it's unique to your game. Exploiters hate unique scripts because they can't just use a "universal" bypass.
It's a Constant Battle
The most important thing to remember is that no roblox anti cheat script is perfect. It's a cat-and-mouse game. As soon as you find a way to stop one exploit, someone will find a new way to break things. The goal isn't to make your game 100% hack-proof—that's basically impossible—it's to make it annoying and difficult to cheat in your game.
Most "script kiddies" just want an easy win. If your script stops the basic stuff, they'll probably just move on to a different game that has no protection at all. Keep your logic on the server, validate every single request, and don't be too hard on players with laggy internet. If you do those three things, you're already ahead of 90% of the games on the platform.
Building these systems takes time and a lot of testing, but it's worth it when you see a clean leaderboard and a community that actually enjoys playing the game the way it was meant to be played. Don't get discouraged if someone finds a loophole; just patch it, learn from it, and keep moving forward.