New research shows 39% of all Counter-Strike 1.6 game servers were trying to infect players through vulnerabilities in the game client. Researchers explain how a developer is utilizing game client vulnerabilities, the Belonard Trojan botnet, and malicious servers to promote the game servers of his customers and enlist more victims to the botnet. A fix is expected to be forthcoming to prevent this botnet from being created again, but sinkholes have so far been able to prevent further infections. Dr. Web was able to shut down the domains that the Trojan used to use to redirect players to fake game servers.
Source: https://www.bleepingcomputer.com/news/security/39-percent-of-all-counter-strike-16-servers-used-to-infect-players/