Sitting Ducks starts off with Bill running into (ok, running away from) Aldo. When you finally get away from the larger character, Aldo starts complaining about a toothache. The two characters become friends quickly, and Bill feels that it is his duty to take Aldo to the only dentist in Ducktown - Cecil. From that point on, Bill and Aldo go on more than 60 missions across all corners of the fowl-filled city. The two characters grow together, but end up facing a few challenges because of their odd friendship, although overall, people are accepting of the new alligator in town. You start off on your skateboard, but it isn't long before you are able to drive a scooter. In the end, you will be able to ride around on six different scooters and six other vehicles.
But Sitting Ducks isn't only a mission-based driver. Not every mission requires that you zoom along on some vehicle. There are a few occasions when you must take to your webbed feet to complete the given goal. When waddling around, the game takes on more of a platformer feel than a driver. For example, one mission requires that you kick a ball back to a young duckling. Sounds simple, right? Well, the ball is on the other side of a wall and the only way to get the ball back is by using a series of ramps and walkways. The 60+ missions are made up of two types. Most of them (more than 50) are required missions that you must complete in order to further the story. The rest of the missions are used to unlock objects and characters for the Multiplayer Mode.
Along with the many missions, Sitting Ducks also has plenty of items to buy; some of them are needed in order to complete game, while others are there simply to enhance the gameplay experience. For example, you don't need the maps for the many parts of Ducktown, but it helps a lot. Bill can purchase a wide variety of objects at the local shop. Apparently the currency in Ducktown is feathers, although it's hard at first to keep your feathers. Every time you bump into something (no matter how slight), several feathers go flying off of you. Though you typically have time to get the feathers back before they disappear, when in a timed mission, you don't want to have to deal with it. Eventually though, you will find places to regain the lost money, like the playground where scoring a point in the soccer goal will nab you a few feathers, or the boxes that spit out feathers when jumped on.
The Multiplayer Mode puts you and a friend together in a part of Ducktown where you will race. There are four types of races in Sitting Ducks's Multiplayer Mode. The first one is called "Star," where you have to find the star and keep it for 60 seconds. Another race is called the "Stage Race," where you have to race through the city passing through checkpoints. The "Egg Hunt" race has you searching for your egg and bringing it back to your home before your opponent does. And finally, there is the basic race -- be the first to cross the finish line, and you win.