How to Block a Game in Facebook
Facebook games are part of a group of third-party programs called applications, or apps. Blocking a game application stops it from sending you any requests to play or gaining access to your profile data, even if you previously granted the game application access. Once you block a game, you can no longer play it on the social networking site until you unblock it. Visit you list of blocked apps and click "Unblock" next to the game to take it off your block list.
Go to the search field at the top of any Facebook screen and enter the name of the game. Click on the "See More Results" at the bottom of the search result short list created by Facebook.
Click the "Apps" tab in the left column of the screen.
Locate the game you want to block in the search results and click the gray "View App" button to the right of the game's name.
Click on the blue "Block Application" link, located on the left side of the page.