Achievements are goals that you can complete by playing the game.
Some Achievements require you to do only one thing, while others require that you do a given action a number of times.
You can view all achievements and your progress with the Achievements button in the Main Menu.
Each achievements gives a minor extra amount of score in your match.
This is a full image of all the achievements.
There are a total of ?? achievements that can be earned to get points for the player's profile on Game Center.
List of Achievements
Making a table here