Gabe Newell, valve’s co-founder and president, pointed out that Valve games can come to consoles.
Gabe Newell attended a Q&A at a public school in New Zealand and asked, “Will Steam bring any game to consoles, or will it stay only on PC?”
Although the question mentions the PC platform Steam, Gabe Newell is probably referring to Valve’s own games, such as Counter-Strike, Half-Life, Portal and Team Fortress.
Valve’s last game on consoles was Counter-Strike: Global Offensive, released in August 2012 for PlayStation 3 and Xbox 360.
You can watch the question and answer on the subject in the video below.