Portal creator Valve has released a beta app for iOS and Android devices.
The app will allow users to chat with Steam friends, browse community groups and profiles, view screenshots and user-generated content and check on sales on the Steam service.
"The Steam app comes from many direct requests from our customers," said Gabe Newell, co-founder of Valve.
"Mobile is changing way people interact, play games and consume media, and the Steam app is part of our commitment to meet customer demands and expand the service functionality of Steam to make it richer and more accessible for everyone."
Users can download the free app now and will be added to the beta service as it ramps up.