With the reveal late last month of Valve's preparations to bridge the gap between usual desktop PCs and the living room using Steam Machines and their in-house Steam Controller, many were left scratching their heads as to how such a controller - which utilises trackpads instead of the traditional stick layout - would actually work for mouse-dominated games.

Well, Valve has you covered there with the release of a new demo showcasing the controller in action for the very first time with a number of mouse games including Portal 2, Civilisation 5, Counter Strike: Global Offensive and Papers, Please.

Here's a quick look at some games being played with the prototype version of the Steam Controller -- the same version that we'll be shipping to 300 Steam users later this year. We'll post more demonstrations like this soon, including footage of some other game developers using the controller to play their own games.

The original announcement revealed that the controller offers up to 16 buttons for the player to use, including four on the front touchscreen which is currently being represented on the prototype as four individual buttons. Each game is able to customise exactly how they use the controller, with an example given in the video with Papers, Please, a game that is set up to use both trackpads as one mouse-controller function.

Check it out below for a great look at the potential of the Steam in the living room. For all three previous announcements on SteamOS, Steam Machines and the Steam Controller check out the landing page over here.