Here is the full list of all 17 Plenty: Skyhearth achievements.
Kill your first bird.
Score 10 points in one round.
Accumulate 1000 harvested birds.
Accumulate 2000 harvested birds.
Score 100 or more points in one round.
Score 25 points in one round.
Score 50 points in one round.
Hit a falling bird before it hits the ground.
Where do you come from?
Complete the tutorial.
Beat the internal Tiny Lions high score.
Score 75 points in one round.
Score 125 points in one round.
Welcome to the beginning.
Score 50 points in one round during the Skyhearth Wingshooter Classic.
Score 75 points in one round during the Skyhearth Wingshooter Classic.