Here is the full list of all 84 Ostrich Island achievements.
You unlocked Brawler skill.
You walked on a beach with at least 3 chicks.
You unlocked Sprinter skill.
You found all the hidden food on island six.
You have discovered every nook and cranny of Ostrich Island. You are the Master of this game.
You survived on the cloud #11 for 5 minutes.
You finished the Game+ mode.
You found Statuette of Alda, mother of Ostrich.
You found the Cork Hat
You found the skin: Chicken
You collected all available bonuses on Tiny Island.
You found the skin: Cheetah
You completed the collection of beautiful Ostrich Island photos.
You unlocked Score Collector ability.
You found the Santa's Hat.
You increased Eggs Converter Speed.
You increased Eggs Converter efficiency.
You activated Eggs Converter.
You found the Heart-Shaped Glasses.
You mastered Co-op mode and finished with higher score several times.
You found Statuette of Alarice, aunt of Ostrich.
You destroyed over 50 trees on some island!
You found the skin: Black & White
You found the skin: Striped
You found a hidden bonus on the first island.
You destroyed an idol without using a super power.
You are the King!
You unlocked Heavy Hitter ability.
You sent home two chickens at once.
You reached 50% mark on the way to the game mastery.
You found a beautiful doll.
You took 50 photos.
You found the location of Labyrinth.
You activated all portals on Island 4.
You found Statuette of Osrik, uncle of Ostrich.
You fixed the broken portal before having fun.
You found Statuette of Morgen, father of Ostrich.
You destroyed a small army of bony fiends by dropping a tree on it.
You found a fish in a mud!
You found the Peaked Cap.
You found the Strange Hat.
You found Statuette of Agmund, cousin of Ostrich.
You unraveled the destiny of Giant Egg.
You found the White Hat.
You do like to play dirty, don't you?
You have scored a goal with a lobster. Birds gonna get angry.
You scored a goal while playing with mangos!
You found the skin: Bamboo
You found the Bowler Hat
You discovered The City Of Lost Chickens!
You joined Workshop, created a skin and gifted it to Ostrich Island Community.
You have finished the game.
You found the skin: Lizard
You caught all the fish on the second island.
You caught 7 butterflies.
You solved the tree puzzle on the first island.
You unlocked Jumper ability.
You found the skin: Domino
You found Statuette of Dagna, niece of Ostrich.
You found Statuette of Bathilda, sister of Ostrich.
You found the skin: Cow
You found the Elegant Hat.
You have collected all eggs on some island.
You installed Water Control Device.
You unlocked Fast Walker ability.
You found the Cowboy Hat!
You found the skin: Zebra
You found Statuette of Manfred, nephew of Ostrich.
You haven't seen such an Egg before.
You lowered a bridge without hitting it.
You found the Sunglasses.
You unlocked Sharp Vision ability.
You found the Hat of Sea Dog.
You collected the third Egg in a split second.
You found the skin: Tiger
You found Statuette of Dedrik, grandpa of Ostrich.
You unlocked Egg Master skill.
You found the Photo Camera.
You found the Treasure Island.
You found Statuette of Egbert, brother of Ostrich.
You found the Green Hat.
You completed the first island.
It's Halloween Time!
You collected two eggs in the blink of an eye.