You'll be able to hop into the beta, click a button and see Steam reformatted for your TV and usable with a PC game controller or a mouse and keyboard if you want to play that way. There are some games that are better made for a for controller input than others so those will be the best experiences . But everythig will be there. You don't have to give up all your favorite stuff once you walk from the den to your living room.

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The war for middle earth. It begins.