Valve has released a promotional video showcasing the various features of its Steam Machines.
The video begins with footage of an early version of the SteamOS in action, followed by picture-in-picture footage of Portal being played with the Steam Controller.
The video also features a batch of trailers and gameplay footage for a number of games that will be available on Steam Machines.
Valve revealed 14 third-party Steam Machines earlier this week at the CES expo in Las Vegas, with specs and pricing details.
The units - which come from companies including AlienWare and Origin - range from $499 to $6,000 and contain vastly different hardware specifications.
Click here for a gallery of the Steam Machines officially revealed this week.