There are two titles available at first: Asteroids Attack, and Don’t Smile. These casual, fun games are designed with social interaction and fun in mind, rather than serious competitive play. Facebook will add two more games in the coming weeks.
“People continue to discover video chat in Messenger, with over 17 billion video chats last year, twice as many as the year before. We hope this new experience will help you create fun memories with the people you care about most, even when you can’t be together.”
To play the games you will need the latest version of the Messenger app installed, and a running live video chat. Facebook has not opened up development of Messenger AR games to developers yet, according to Techcrunch, and currently does not monetize the games using ads or sponsorship.