American Football Free Screensaver. Photos slideshow. American Football screensaver. This free screensaver contains many pictures of American Football. American football, known in the United States simply as football, is a competitive team sport known for mixing complex strategy with intense physical play. The object of the game is to score points by advancing the pointed-oval shaped ball into the opposing team s end zone. The ball can be advanced by carrying it (a running play) or by throwing it to a teammate (a passing play). Points can be scored in a variety of ways, including carrying the ball over the goal line, throwing the ball to another player past the goal line, tackling an opposing ball carrier in his own end zone, or kicking the ball through the goal posts on the opposing side. The winner is the team with the most points when the time expires and the last play ends. Outside the United States, the sport is referred to as American football (or a translation thereof) to differentiate it from other football codes. In Australia and New Zealand the game is known as Gridiron football, although in the United States the term gridiron refers only to the playing field itself. This screensaver is free, and contains no spyware or virus. It was fully tested by our team before making it available. This screensaver has many transition effects and will never look the same. You can take the full control of the screensaver behavior : change its settings. Sequent, position, effects. Enjoy. The total number of transition effects is now 84 and new effects are: Crossed (Left, Right), Boxed (Grow, Shrink), Triangle, Roll (Left, Right, Top, Bottom, Horizontal, Vertical).