Full list of all 20 Chickens Can't Fly achievements worth 200 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Windows Phone.
Eliminate 1000 obstacles using the Butcher Shield, Holy Cross, Nuke or EMP
Get Gold on ALL experiments
Get Gold for all experiments in a non-tutorial laboratory
Get at least a bronze medal in all Physics experiments
Get at least a bronze medal in all Military experiments
Get at least a bronze medal in all Cemetery experiments
Get 10000 points with a Corn Magnet
Obtain a score multiplier of over 100
Eat 5 sausages without dying
Gather 1.000.000 total corn
Get 300.000 Score in a single game
Survive 20 checkpoints in Survival mode!
Pass 5 checkpoints without touching a wall
Pass 3 checkpoints without flapping the wings in Survival Mode
Get at least a bronze medal in all Butchery experiments
Have over 9 lives in Survival Mode
Use 5 different delayed power-ups
Participate in the Global Weekly Challenge
Complete all the Hatchery experiments
Obtain a gold medal in one of the experiments