In "Duck Life 4", players are entrusted with the task of training a duckling to become the world champion in a multitude of competitions. The game unfolds on an island featuring multiple locations, including a training gym, a pond, and a farm. The duckling needs to train in various skills like running, flying, and swimming, and engage in competitions against other ducks in diverse events such as races and battles. The more competitions the duck wins, the more money the player earns to purchase superior equipment and enhance the duck's abilities.