Block Party Achievement in FIFA 12
Manually block 5 shots while defending in a single game
How to unlock Block Party
To manually block one of your players must block a shot without you pressing a button to make him do so. Like Precision Tackler, this might come by just playing matches, but is also boostable with a friend, though it's harder to boost than Precision Tackler as you don't know if your player will block the shot.