This is an ACCOUNT for OBSERVATION on Counterstrike Global offensive servers. Please read description for more informations about Valve Anti Cheat secure and hidden tags.




Valve Anti-Cheat (VAC) is an anti-cheat software product developed by Valve as a component of the Steam platform, first released with Counter-Strike in 2002.

When the software detects a cheat on a player's system, it will ban them in the future, possibly days or weeks after the original detection.[1] It may kick players from the game if it detects errors in their system's memory or hardware. No information such as date of detection or type of cheat detected is disclosed to the player. After the player is notified, access to online "VAC protected" servers of the game the player cheated in is permanently revoked and additional restrictions are applied to the player's Steam account.
Valve rarely discusses the software, as it may help cheaters write new code or conduct social engineering.[21]

The software sends client challenges to the machine; if the appropriate response is not received, it is flagged as a possible violation. It uses Signature Scanning to detect possible cheats when scanning the computer's memory and processes. Whenever an anomaly is detected, an incident report is created and compared to a database of banned applications and/or analyzed by Valve engineers. The engineers may inspect the code and run it on their own copies of the game. If the code is confirmed as a new cheat, it is added to the database of cheat codes.[28][29]

According to Steam's lead engineer John Cook, to stop the anti-cheat software itself from being exploited, "The software is constantly updated and sent down in small portions for the servers as needed, so hackers only get to see small portions of it running at any particular time. So while they may be able to work around pieces of it, they can never hack everything."[29]

Valve also accepts submissions of cheat programs and cheat websites from players by email. Players may also report players they suspect of cheating through their Steam Community profile, although players are not banned from these reports alone.[30]

If a cheat is found, the player's Steam account will be flagged as cheating immediately, but the player will not receive any indication of the detection. It is only after a delay of "days or even weeks"[1] that the account is permanently banned from "VAC Secure" servers[30] for that game, possibly along with other games that use the same engine (e.g. Valve's Source games, GoldSrc games, Unreal engine games). Valve never discloses which cheat was detected. Players have criticized the system for taking weeks to months to ban cheaters.[31]

Large numbers of flagged accounts may also be banned in "waves".[32][33]

The user's Steam profile is also marked with "ban(s) on record", which is publicly visible and cannot be hidden, regardless of the profile visibility of the banned account. VAC bans become hidden to other users after seven years of not getting another VAC ban. An analysis of 43,465 users that had been banned between April 2011 and October 2011 showed that the more VAC banned players a user is friends with, the more likely they will also be VAC banned themselves in the future. After they were banned, they lost more friends, were more likely to increase their privacy settings and also had more VAC banned friends than non-banned players.[40] Banned players are also sometimes referred to as going on "VACation".[33][41]