Video: The most overpowered weapon in CS:GO history
Back in 2015, the R8-revolver eliminated the need for any other weapons in CS:GO
In 2015 Valve released a patch that introduced the R8-revolver, and it overtook every CS:GO server in existence due to the ridiculous damage output and accuracy that it bolstered. On top of this, you were able to buy it for only $850. It was basically a "pistol-AWP" that you were able to purchase every round. Even though you seldom see the R8 used now, it had 48 hours of glory back when it was released.
Watch the history of the most broken gun is CS:GO history: