Here is the full list of all 38 Ary and the Secret of Seasons achievements.
Finish the game in less than 5 hours
Finish the game without completing any side quests
Finish the game without dying once
Finish 9 stork towers
Obtain all the hearts
Finish the ending credits and discover the epilogue!
Destroy 100 spheres with black crystals
Kill 500 enemies
Slide without interruption for 5 seconds
Let 25 enemies perish by other enemies
Defeat the Autumn Golem
Defeat the Spring Golem
Defeat the Winter Golem
Defeat all four Season Golems
Create a mushroom chain reaction
Take down an enemy from afar
Defeat the Summer Golem
Open 50 chests
Roll 100 times
Break 6 pots at once
Cast all seasons in one place
Gain 1 life heart
Defeat your first Mandrake
Get the Guardians' revelation
Free the children and escape the mine
Get trapped by Crocus
Cast each season sphere 200 times
Defeat Muscari
Meet with the Guardians for the first time in a long time
Open 25 chests
Complete 10 quests
Engage Prince Crocus
Kill 5 enemies in less than 15 seconds
Jump 1000 times
Get out of Yule
Open 1 chest
Witness the season change
Appear almost identical to Flynn