Since some months ago Facebook implemented some simple games in Messenger, as the dominated or basketball. Now things get interesting, since Messenger has integrated the Instant Games platform where you can play some classic titles with your friends.
The games work within Messenger and to activate them simply touch the icon in the form of control of video games. Doing so opens a screen where you can select titles such as Pac-Man, Space Invaders, Galaga and many more. The social component comes in the form of markers, since each game will tell us which position deal with respect to our friends.
Only Messenger games are available as beta phase in some countries and will also work within the News Feed, so you can kill productivity or take advantage of those hours killed in the office.
Currently there is a definite date for its launch around the world, so we are awaiting.