Valve's Steam Controller Prototype Hands-On at GDC 2014 - YouTube
Amazon.com: TouchProtect for Steam Controller - Enhance Tactile Feel, add Style, and Protect Your Trackpads. for Steam Controller and Vive Controllers (Hex - Black) : Video Games
Valve's gaming handheld is called the Steam Deck and it's shipping in December - The Verge
Amazon.co.jp: 【国内正規品】 Steamコントローラ : ゲーム
Steam Controller 2. Oh no, Valve 'want to make it happen' | PC Gamer