Today Google unveiled a brand new Play Games app, that serves as a companion hub and portal for the Google Play Games Services, announced at I/O. The app serves as a front end for viewing leader boards and connecting with friends (from your Google+ circles, of course), simplifying the act of challenging them in head-to-head competitions. Play Games, in addition to serving as a place to track all of your achievements and other such gaming goodness, serves as a single repository for launching all your games. Think of it like Steam, but for your Android tablet or phone, and with a slightly less graphically-impressive library of titles. Asphalt 8 Airborne, Riptide GP2 and Prince of Persia The Shadow and the Flame are will be among the first to take advantage of the new Play Games App, with the latter hitting virtual shelves tomorrow.
Update: It's now available on Google Play; hit the source link for your download.
Google Play Games hub