There is a .NET library called QueryMaster(https://archive.codeplex.com/?p=querymaster), you can send/receive anything for many games based on Gold Source and Source engine.
This is fairly easy task to do if you have experience in .NET languages.
supported games list
Half-Life 2 ,Counter-Strike: Source ,Half-Life: Source ,Day of Defeat: Source ,Half-Life 2: Deathmatch ,Half-Life 2: Lost Coast ,Half-Life Deathmatch: Source ,Half-Life 2: Episode One ,Portal ,Half-Life 2: Episode Two ,Team Fortress 2 ,Left 4 Dead ,Left 4 Dead 2 ,Dota 2 ,Portal 2 ,Alien Swarm ,Counter-Strike: Global Offensive ,SiN Episodes: Emergence ,Dark Messiah of Might and Magic ,The Ship ,Bloody Good Time ,Vampire The Masquerade - Bloodlines ,Garry's Mod,Zombie Panic! Source ,Age of Chivalry , Synergy ,D.I.P.R.I.P. ,Eternal Silence ,Pirates , Vikings , & Knights II ,Dystopia ,Insurgency ,Nuclear Dawn ,Smashball,Counterstrike Global Offensive and many more.........
Linear Mode
