What Is a VAC Ban on Steam and CS:GO?

What VAC actually is

VAC stands for Valve Anti-Cheat. In Valve's description it is an automated system designed to detect cheats installed on users' computers. It regularly checks the game files of users connected to Valve's servers, and it identifies cheats by their signatures — the recognisable fingerprint a known piece of cheat software leaves behind.

Valve's definition of a cheat is broad: any third-party modification to a game designed to give one player an advantage over another, including modifications to a game's core executable files and dynamic link libraries. That is the whole test. Intent is not part of it, and neither is whether you personally installed the thing.

Two things Valve names explicitly as not triggers: system hardware configurations, and updated system drivers such as video card drivers. If someone tells you their new GPU driver got them VAC banned, Valve has already answered that.

Valve also states that users are not VAC banned on the basis of reports alone — other factors are taken into account before a ban is issued. And server admins cannot issue VAC bans; they can only ban you from their own server. For how VAC fits alongside VACnet and Trust Factor in CS2 specifically, see our breakdown of whether CS2 anti-cheat is better than CS:GO's.

How a ban is applied

Valve's wording is precise and worth reading twice: VAC bans are applied when an account, or an account using the phone number tied to other accounts, connects to a VAC-secured server while running cheat software.

So there are two mechanisms in one sentence. The obvious one is the machine you are playing on. The less obvious one is phone-number linkage, and it is the reason ban evasion is harder than making a fresh account:

• Phone numbers spread the ban.Valve states that VAC bans are applied to all accounts sharing a phone number at the time of the infraction. Accounts sharing that number which do not even own the game still receive a VAC ban, and will not be able to purchase the game afterwards. Valve notes this feature is not enabled for every game and is used at the developer's discretion.
• Family Sharing counts. If your library is used by someone else to cheat, Valve says your Family Sharing privileges may be revoked and your account may also be VAC banned. VAC-banned games cannot be shared between accounts at all.
• "It wasn't me" is not a defence.Valve's position on a compromised or borrowed account is that any ban added to an account remains regardless of who was using it, because the use and security of your account are your responsibility.

Valve will not tell you which cheat was detected. It says it keeps detailed records for every ban but does not release them, because doing so would only help cheat developers.

Permanent and non-negotiable — what that phrase means

Valve puts the same warning at the top of both of its VAC help articles: VAC bans are permanent, non-negotiable, and cannot be removed by Steam Support. If a VAC ban is determined to have been issued incorrectly, it will automatically be removed.

Read the second sentence carefully, because it is the entire appeal process. There is no form, no queue and no human to persuade. Valve states directly that VAC bans cannot be appealed, and that Steam Support does not manually remove VAC bans applied to accounts for any reason. Erroneous bans get reversed by Valve's own investigation, on Valve's own timetable — and Valve has never published how long that takes, so anyone quoting you a review window is guessing.

This is also why every "VAC ban removal service" is a scam. Steam Support cannot do it; a stranger on Discord certainly cannot.

How far the ban reaches

A VAC ban is not a Steam ban. You keep your account, your library and your access to the store. What you lose is scoped — but the scope is wider than one game in two specific ways.

Game families. Valve publishes two lists where a ban in one title bans you in all of them. Cheating in Counter-Strike: Source, Half-Life 2: Deathmatch, Day of Defeat: Source or Team Fortress 2 results in a VAC ban across that whole Source group. The same applies to the GoldSource group: Counter-Strike, Counter-Strike: Condition Zero, Ricochet, Day of Defeat, Team Fortress Classic, Half-Life: Deathmatch and Deathmatch Classic. Counter-Strike 2 appears on neither list, so a CS2 ban does not by itself take TF2 with it.

Accounts.The phone-number rule above is the account-level reach. To see exactly which games a ban covers on your own account, Valve directs you to Steam > Settings > Account tab > "Click here for details" under VAC Status.

What a VAC ban does and does not affect

The insecure-server line is genuinely useful and widely missed. Valve confirms VAC-banned accounts can still play single-player games, local LAN games and multiplayer on non-VAC-secured servers, and even documents the filter: from the Steam main menu, View > Servers > Change Filters > "Not secure" in the Anti-cheat dropdown. Not every game offers them, and no ranked ladder does.

VAC bans versus the other bans people confuse them with

• Game ban.Applied by Valve at a developer's request. The developer is solely responsible for the decision and sets the duration, and Valve says the effects must be consistent with a VAC ban — preventing online play and/or trading items for that game — but cannot stop you launching the game offline or using Steam. Only permanent game bans show on your profile; temporary suspensions do not. Counter-Strike 2 has its own game-ban article, and it lists rank manipulation, botting and automation, and deliberately interfering with servers or players alongside cheating. Those are also permanent and also not appealable.
• Server ban. Issued by whoever runs a community server, for any reason they like. Valve cannot prevent these and will not help with them. If you are banned from a large number of community servers at once, Valve suggests you have likely been hit by a third-party ban tool, which is unrelated to Steam.
• Trade or community ban.A Steam Support action against the account's trading or community privileges, separate from anti-cheat entirely.
• Competitive cooldown.A temporary CS2 matchmaking penalty, not a ban. It is worth knowing that Valve's Trading and Market Restrictions page groups "a VAC Ban, cooldown or overwatch ban" together when describing CS2 store and trading restrictions, without defining cooldown further on that page.
• Low Trust Factor. Not a ban at all — it is a matchmaking signal, and it is the thing most players who say they were "shadow-banned" are actually describing. Our Trust Factor guide covers what you can and cannot read from it.

Staying on the right side of it

1. Only play on machines you control. Valve's own advice: if you are not sure whether the machine you are using has cheats installed, do not play on VAC-secured servers.
2. Be careful with mods, scripts and custom content. Valve warns that cheats are sometimes disguised as game modifications, and that downloading from untrusted sources is how people get banned for someone else's software.
3. Do not share a phone number. This is the one most people get wrong. A shared number can carry a ban to accounts that do not even own the game.
4. Keep your account secure. A hijacked account that gets VAC banned stays VAC banned — Valve is explicit that it will not reverse those.
5. Already banned? Read what to do after a VAC ban for the realistic options, and whether you can still trade your skins before you promise anyone anything.