The "most interesting chicken in the world" is back in his first sequel Rocketbirds 2: Evolution, where Hardboiled Chicken gets entangled in a mysterious and sinister penguin plot in "Part 1: The Cockup". Meanwhile, the pint sized budgie commandos are forming a strike force of great magnitude in "Part 2: The Rescue", where players need to rescue and recruit hostages from deep behind enemy lines. Both parts can be played in or out of order, but converge to complete the full Evolution story.