SteamDB on Twitter: "Valve has changed their Steam controller once again, here's an image showing the latest revision http://t.co/kFVhMQ0XrC" / Twitter
Steam Controller Review - IGN
Amazon.com: Steam Controller : Video Games
Steam Controller (Steamworks Documentation)
Steam Controller (Steamworks Documentation)
We hate Valve's Steam Controller because it's different | Engadget
Amazon.co.jp: Steam Controller (輸入版:北米) [並行輸入品] : Video Games