If the Alienware Steam Machine looks familiar, it’s probably because it has the exact same chassis as another PC built for the living room: the Alienware Alpha — the unofficial Steam Machine Dell launched without Valve’s support late last year. Dell classifies these PCs as different products, but they’re mostly separated by their operating systems: Windows 10, for the Alpha and SteamOS for the Alienware Steam Machine. Today we’re looking at the latter, Valve-sanctioned Steam Machine, but both rigs have a great chassis: It’s compact, subtle and fits right in with everything else in your entertainment center.