How do you play on Steam Machine?

[captaindefenestrator]

Being able to stream from the Steam Machine would be much easier on my back than hauling the computer back and forth to the living room, but so far, I can't figure out how to get it to work. I can't get a cursor, and can't select any options.

The game says "Controller Configuration Required." I see some templates, but I can't seem to find one that lets me bring up a cursor or even tab through menu options.

Pretend I bought my Steam Machine used, so it came with no M for me to RTF. How do I make the app work, please? I'm sitting here with my newly-purchased Streets of Arkham set and want to get in a game within the next hour or so if possible.