Drop7 by Zynga is a fascinating puzzle iPhone game. Check out the hypnotic numerical spell of Drop7 in this exciting game. The players have to drop numbered discs into a grid in order to stay alive and for chain reaction bonuses. To become the master of the game, you have to sharpen your strategies. Drop7 by Zynga includes 3 amazing game modes such as normal mode, fast-paced hardcode mode and the mysterious sequence mode. The best thing about this game is that it saves your current state and allows you to restore the same session without losing any progress. The players can also compare the high scores with their 'Facebook' friends.