Client-side anti-cheat tries to stop tampering on the player's device, while server-side detection looks for behavior that the rules of the game make impossible or unlikely. Neither is enough alone. Client checks are bypassable, and server checks only see what the player sends. Most teams need both, with the server as the final judge.
What client-side detection does
It runs next to the game on hardware the player controls. Typical jobs are integrity checks on game files, detecting known cheat tools, and making memory editing harder.
Strengths: it can stop casual cheating early and it can see local facts the server never will, such as a modified binary.
Weaknesses: the attacker owns the machine. Any check that runs there can be studied, patched or skipped. It also adds support cost, since false positives hit honest players, and heavy checks can raise privacy questions for your community. Treat it as friction, not a trust boundary.
What server-side detection does
It works from the data you already receive: inputs, timings, positions, resource changes and results.
- Physical plausibility. Speed, turn rate and reaction time have limits.
- Statistical outliers. An account that is right far more often than anyone else in the same bracket deserves a look.
- Economy anomalies. Sudden currency gain with no matching source.
- Network patterns. Many accounts acting in lockstep suggest a bot farm.
Strengths: cheaters cannot patch your servers, and rules updates ship instantly. Weaknesses: some cheats, such as passive information overlays, send no unusual input at all, so the server cannot see them.
How to combine them
- Make the server authoritative for rules and economy first. Detection on top of a trusting server is a losing game. See why game servers must not trust the game client.
- Add cheap client checks for file integrity and known tools. Log the result, but do not rely on the client reporting honestly.
- Collect server telemetry per match and per account, so detection can be improved after release without a client patch.
- Score risk instead of banning on one signal. Use review queues for borderline cases.
- Keep an appeals path. A wrong ban costs more trust than a missed cheater.
Ban timing and evidence
Delayed enforcement is a common choice because instant bans teach cheat authors exactly which behavior triggered them. The tradeoff is that honest players keep meeting the cheater for longer. Pick a delay on purpose and keep the evidence for each ban, so a support agent can explain it later.
Metrics worth tracking
- Reports per thousand matches, split by region and mode.
- Confirmed cheater rate among reported accounts.
- Appeal overturn rate, which measures false positives.
- Time from first signal to enforcement.
Safeguard does not do anti-cheat. It can scan the dependencies of your backend services and flag known vulnerable packages, and you can try the free scan at https://gold.safeguard.sh/scan.
Quick check
Can a kernel level client driver make the client trustworthy?
It raises the effort a lot, but it does not change who owns the machine. The server should still decide outcomes.
Which should I build first?
Server authority and server telemetry. They cannot be bypassed from the player's device and they improve every later detection.
Last reviewed: 19 October 2026.
