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