How do I stop people cheating on my gaming PCs?

Nothing clears a tournament faster than the word hacker. One player is snapping to heads through walls. The room notices. By the next event, the regulars who actually pay your rent are playing somewhere they trust more.

That is the thing owners miss about cheating in a cafe. It is not really a technical problem. It is a reputation problem wearing a technical disguise. Reputation is the whole product you are selling. So you fight it in layers, because no single layer holds.

Start with the room, not the software

The cheapest anti-cheat you own is a well-run floor. Most owners under-use it.

A lot of cheating is lazy. It relies on nobody looking. Sightlines that let staff see screens from the counter, a rule against plugging in personal USB sticks, a quick word with the player everyone is complaining about: these stop the casual cases before any software gets involved. During a tournament, a staff member walking the room is worth more than any detection log.

House rules also set the tone. A cafe that visibly cares about fair play attracts the players who want fair play. Those are the ones who fill your seats on a Tuesday. The software is the layer underneath, for the cheaters who are not lazy.

What the software catches that you cannot

Some cheats you will never spot from the counter. That is where the client's tamper monitor comes in. It runs background probes at random intervals and reports what it finds.

It watches for the tools cheating actually uses:

• Memory editors like Cheat Engine, ArtMoney and ReClass.
• Reverse-engineering tools like x64dbg, IDA and Ghidra.
• Injectors like Process Hacker and Scylla.
• Commercial cheat brands, matched by process name and by DNS lookups for their domains.
• Suspicious drivers, the vulnerable-driver trick that serious cheats abuse.
• On-disk tampering, by hashing its own executable each sweep to catch a patched binary.

There is even a window-title scan, because the oldest trick in the book is renaming a cheat's binary to something innocent. Everything it finds lands in a Tamper Events log with the time, the computer, a severity of Critical, Warning or Info and a plain description. You are not staring at a wall of noise. You are reading a short list of what tripped, on which machine and how serious it was.

Make the cheat unable to attach in the first place

Detection tells you after the fact. Process hardening tries to stop the attack from working at all.

The client can defend its own memory. The clearest example: it can replace its own process security so that a non-admin memory editor loses the read, write and thread access it needs, which blocks a standard Cheat Engine attach outright. There are more of these, from keeping memory non-executable to filtering which code can load into the process.

Here is the honest part, because this is where cafes hurt themselves. A few of these options are marked high risk for a reason. Blocking dynamic code can break a GPU driver's shader compiler and kill your screen capture. Strict handle checks will crash any third-party program with sloppy code. Turn the safe set on first, then add the aggressive ones deliberately and test them, rather than flipping everything and wondering why a machine went dark. Anti-cheat that takes down your own room is not a win.

Ban the machine, not the name

Catching a cheater is only half the job. The other half is making the ban stick. This is where most casual setups fail.

If you ban a username, the cheater makes a new one in thirty seconds. So you ban the device instead. The HWID blacklist bans a machine by its hardware fingerprint. You add a ban from the offender's MAC address with a reason and an optional note. The server resolves it to the device fingerprint. A fresh account, a new username, a borrowed login: none of it helps, because the ban is attached to the hardware sitting in front of them.

That single detail is what turns a ban from a speed bump into a wall.

Borrow the wider network's memory

You do not have to judge every player from scratch. If your members link a Steam account, the Steam VAC tab checks those accounts for VAC bans through the Steam Web API. Once you add your key it sweeps every linked account daily on its own.

A VAC ban somewhere else is not proof of anything in your room. It is still a signal. You use signals like that to decide who gets into your paid tournaments. It is the same account discipline that runs through sharing game accounts across your PCs.

The point is to be the hard target

Put the layers together and you are not chasing a guarantee that does not exist. You are raising the cost of cheating in your room until it is not worth the effort. The room watches the lazy cases. The tamper monitor catches the tooled-up ones. Hardening stops the common attach. The hardware ban makes a caught cheater stay caught. The VAC sweep flags the ones already known.

Cheaters go where cheating is easy. Make your cafe the place where it is not. The players who care about a fair match, the ones who show up for your tournaments and bring friends, make it their room instead. That trade is the entire return on taking this seriously.