To visit the Games area, click on the Games icon (following screenshot) in the gray bar at the top of Plus screens:
The main screen of the Games area looks like the following screenshot with a slideshow showing featured games:
Click on the thumbnail beneath the large game graphic to jump to a specific game. Click on the blue Play button at the lower-left to play the game featured.
The menu to the left of the screen, under your profile picture, lets you chose Featured Games (the first screen you see in this area), a listing of All games ...