The developer of anticheat program left ValveLord Matus
Burton Johnsey, ex-employee of Valve, who was responsible for the development of anticheat and management of the community, left Valve after 10 years of cooperation.
Burton joined Valve in 2007. Except for the development on anticheat and management of the organization, Burton Johnsey also was responsible for analytics and web development. He was a member of Steam developers and participated in the development of such games as Left 4 Dead, Left 4 Dead 2, Dota 2, Portal 2 and CS:GO.
Burton Johnsey commentaries, left in his Steam profile:
«January 12th was my last day at Valve. Having spent my whole adult life at Valve, I have decided that my 30th year on this planet was a perfect time to start the next chapter of my professional life.
If you are reading my profile because you need help with Steam, I recommend asking the fine folk over at http://reddit.com/r/steam»