Team Fortress 2

Team Fortress 2 is ValvePublisherValve CorporationValve is the operator of the Steam platform and the publisher of Counter-Strike 2, Dota 2, and other long-running titles. Its anti-cheat (VAC) is user-mode and predates the kernel-anti-cheat era of competitive PC gaming.4 games in this family →'s class-based multiplayer shooter, released October 10, 2007 as part of The Orange Box and made free-to-play on June 23, 2011. It runs on Valve's Source engine, updated to a 64-bit build in April 2024. Nine distinct classes, a sprawling cosmetic and trading economy, and one of the longest-lived multiplayer games on PC.

Team Fortress 2 asks very little of your machine: VACAnti-cheatValve Anti-Cheat (VAC)Valve Anti-Cheat is Valve's user-mode anti-cheat, in operation since 2002. VAC has no kernel driver and no always-on resident process; detection is server-side and via user-mode pattern checks during a match. Supplemented by VAC Live (statistical pattern detection), VAC Net (machine learning), and Trust Factor matchmaking.4 games in this family → is user-mode, with no kernel driver. The lesson is the trade-off, not a flaw to fear. A lighter anti-cheat is easier to live with and slower to stop a determined, organized cheat operation, which is exactly what the bot crisis showed over several years. VAC bans are permanent and tied to the account rather than, in this game's case, to your hardware. The legitimate client is tf_win64.exe inside the Steam directory.

Team Fortress 2 is protected by Valve Anti-Cheat (VAC), the same user-mode anti-cheat as Counter-Strike 2 and Dota 2. There is no kernel driver, no boot-time component, and no always-on background process; detection is server-side and through user-mode checks during a match. The main Windows process is tf_win64.exe, the 64-bit client introduced in April 2024, replacing the older 32-bit tf.exe. As a trust ask this is among the lightest in PC gaming. What that lightness could not stop is the rest of this plate.

Team Fortress 2 is the clearest public case of a user-mode anti-cheat struggling to contain a problem for years. From roughly 2019 onward, automated aimbot bots flooded Valve's own Casual matchmaking, crashing servers, spamming chat, and impersonating players. In May 2022 the community made #SaveTF2 trend, and Valve broke a long silence with a short statement that it heard players and was working to improve things, followed by a ban wave; conditions eased, then regressed. In June 2024 the community organized again under #FixTF2, gathering a petition with well over 200,000 signatures as Steam reviews slipped. Late that month Valve ran another wave, estimated by community analysts at around 16,000 bot accounts, and this time went after the people hosting the bots rather than only the bot accounts; SteamDB snapshots showed the player count roughly doubling over the following day. PC Gamer, Eurogamer, Dot Esports, and Windows Central followed the arc throughout.