Anti-cheat on PC games

Anti-cheat is game-side enforcement: it tries to detect aimbots, wallhacks, memory edits, and tampered binaries so ranked and social modes stay fair. Implementations range from user-mode checks inside the game process to kernel drivers that load early and watch memory across processes.

The storefront (Steam or Epic) can show "Single-player" while the title still runs middleware that phones home or refuses modified files. Always read store features, patch notes, and multiplayer disclaimers together.

User-mode versus kernel anti-cheat

User-mode

Runs with normal game privileges. Easier to bypass in theory, but cheaper to ship and less invasive for the OS. Still can block known cheat signatures and validate file hashes before matchmaking.

Kernel-mode

Loads a driver that can see more of the system. Stronger against certain cheats, but historically caused friction with Linux, virtualization, and dual-boot workflows until publishers certify supported paths.

Matchmaking, trust, and bans

Anti-cheat feeds trust scores or binary allow/deny gates before you enter servers. Bans may be hardware-linked or account-linked depending on the vendor. If you share a PC with family, read family sharing alongside store rules for seat and account hygiene.

Mods, trainers, and file integrity

Authorized modding sometimes ships as a separate build, a sandboxed workshop pipeline, or hash-whitelisted files. Random trainers or repacked executables often trip integrity checks and can lock you out of online modes without a clear in-client message. Use the save path backup finder before experimenting.

Linux, Proton, and Steam Deck

Proton can run many Windows builds on Linux, but anti-cheat support is per title. Until a Linux or Proton path is officially supported, expect hard stops or unstable behavior. The Steam Deck entry explains handheld-specific constraints.

Privacy and telemetry (high level)

Anti-cheat may collect telemetry about loaded modules and driver versions to detect cheats. Vendors publish privacy policies separately from Valve or Epic. This page does not summarize those legal texts - read the publisher notice for your jurisdiction.

Typical misconceptions

  • "If the game launches, mods are allowed online" - often false; read mode-specific rules.
  • "Disabling Wi-Fi removes all checks" - offline store mode does not remove on-boot checks baked into the exe.
  • "All kernel anti-cheat is identical" - vendors differ in Linux timelines and escalation policies.

See also

FAQ

If Steam is in Offline Mode, can anti-cheat still block the game?
Often yes. Store-level offline is separate from the title's own integrity and auth checks. See offline play for the full split.
Does anti-cheat mean I cannot use mods?
Depends on the game. Some titles allow whitelisted or workshop mods; competitive modes may reject any file change. Read mods and Workshop.
Why does my game work on Windows but not on Steam Deck?
Kernel-level anti-cheat may not support Linux until the publisher ships a supported build. Pair with Proton and Steam Deck.
Is anti-cheat the same as Denuvo?
No. Denuvo Anti-Tamper is a different middleware family (often discussed with licensing). See Denuvo for overlap and differences.
Can anti-cheat cause performance issues?
Sometimes, especially during driver transitions or when background scanners compete for CPU. Treat forum anecdotes as hints and test your own hardware after patches.
Where do I read the official policy for my game?
Start on the Steam or Epic store page and the publisher's support site. This glossary is editorial context, not legal advice.