How to stop exploiters in your Roblox game
Every popular Roblox game gets exploiters, and most of the damage they do is not magic. It is your own server code doing exactly what an untrusted client asked it to. The good news: the majority of exploits die to a handful of server-side habits that cost nothing. Here is the checklist we wish every developer had before shipping, whether or not you ever use an anti-cheat product.
Start from what an exploiter can actually touch
An executor gives a cheater full control of their own client: read any client-visible instance, fire any RemoteEvent or RemoteFunction with any arguments, teleport their own character, and delete any LocalScript, including your anti-exploit one. It gives them nothing on the server. They cannot see server scripts, server-only values, or other players' private state. Every defense that works lives on that line: assume the client is hostile, keep the truth on the server.
Validate every remote like it is a public API, because it is
Any RemoteEvent a client can see is an endpoint anyone can call with anything. Treat each one the way a backend engineer treats a public route. Type-check every argument and reject anything malformed. Check the caller is allowed to do the thing: does this player own that shop item, is that door near them, are they alive? Check preconditions server-side rather than trusting flags the client sends. And never put prices, damage numbers, or reward amounts in the arguments: the client should say "buy sword", and the server should look up what a sword costs.
Make the server do the math
Money, XP, damage, cooldowns, drop rates: if the client computes it and the server saves it, an exploiter sets it. The pattern that survives contact is that clients express intent and servers compute results. A gun's client can ask to fire; the server decides whether the cooldown has passed, whether there is ammo, whether the shot could have hit from where that player actually stands. It is more work than trusting the client. It is also the entire difference between a game that can be ruined and one that cannot.
Rate-limit everything a human does slowly
Humans click a few times a second. Executors call remotes hundreds of times a second. A per-player, per-remote budget on the server (with a small burst allowance for lag) converts a whole class of exploits, from auto-farm loops to shop-spam dupes, into log lines. While you are at it, put a debounce on anything that grants value, and make grants idempotent so replaying the same request twice cannot pay twice.
Own movement, or at least audit it
Roblox gives clients authority over their own character's physics, which is why speed, fly, and teleport exploits exist at all. You do not have to accept that silently. The server can watch positions over time and ask a simple question: could a fair player have gotten there? Sustained speed beyond your game's real maximum, altitude with no support under it, or a position jump with no teleport you granted are all measurable server-side. Be generous with thresholds (lag and knockbacks are real) and treat a breach as a signal to investigate rather than an instant verdict, and you will catch the blatant cases without hurting anyone legitimate.
Log decisions, not just events
When something looks wrong, the question you will actually ask is "what did we know and when?". Log rejected remote calls with the reason, rate-limit trips, and physics anomalies with enough context to reconstruct the moment. When you do act against a player, keep the evidence attached to the action. Future you, handling an appeal from an angry (and possibly innocent) player, will need it.
Know where the ceiling is
Everything above hardens one game against one account. It does not tell you that the account you banned yesterday is back on a fresh alt, it does not get better by learning what cheating looks like across millions of sessions, and it does not come with a review queue, an appeals flow, or staff tooling when your game is big enough to need them. That layer is what a dedicated anti-cheat platform is for. waves.ac adds server-authoritative behavioral detection, evidence-backed enforcement through Roblox's official Ban API, and cross-game standing, and it starts in shadow mode so you can watch it judge your real traffic before it is allowed to act. The checklist above still matters with waves installed: a game that validates its remotes gives any detection engine a far cleaner signal to work with.