Facebook had great success a few years back with it's integrated games you could play while browsing your page. Games like Farmville had millions of players and a great following, but gaming wasn't what everyone was after on the social site. Now, Facebook has introduce "gameroom", a place completely focused on playing video games, getting notifications, watching others play live and even have the opportunity to build your own game and upload it to the gameroom for others to play.
The program is software in .exe format that you install on your PC and actually brings the games away from the Facebook platform.
Getting Started is easy, after you download and install the software, you can launch the gameroom from a desktop shortcut as you would with any other program. Here are a few screen shots on navigating the room:
Here you can browse games by category and download them if you don't already have them
You even get game notifications too in the upper right hand corner
If you want more info on creating games for the Facebook Gameroom visit here