Alienware went through eight revisions over two years in collaboration with Valve before the gaming PC vendor came to its final Steam Machine. That's how serious Alienware claims to be about Valve's hardware initiative, and it shows in the design.This Steam box is more subdued than most of Alienware rigs, with the only lighting on the all-black box being on its glossy face. Naturally, the Alienware logo glows, but so does Valve's logo, which appears in a triangular cut into the bottom-left corner of the device. At the moment, the Alienware logo is a hard button that changes the lighting from blue to green to red and so on.Up front, the unit houses two standard USB ports. Around back, Alienware kept the I/O simple, with just two USB 3.0 ports, Ethernet and HDMI-out below two large vent outputs. (Intake lines the bottom edges of the unit.) Up top, the unit is coated in a soft touch finish.Honestly, after eight revisions, I would expect something more radical, but Alienware's Steam Machine is right up there with the PS4 in terms of size and style.