. . "There are many hidden references and Easter eggs sprinkled throughout Cookie Clicker. Many are hidden in achievements and upgrades. They are in the title of the achievement/upgrade, or the description."@en . "There are many hidden references and Easter eggs sprinkled throughout Cookie Clicker. Many are hidden in achievements and upgrades. They are in the title of the achievement/upgrade, or the description."@en . . . . . "References/Easter Eggs"@en .