Full list of all 31 The Secret Order 5: The Buried Kingdom achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
You re-energized the central crystal
You collected every Lava Dragon Egg
Well done! You made it out to the seabed
You saved the Buried Kingdom from being swallowed by the sea
You're the best friend anyone could wish for
You entered the crystal
You collected every Purple Dragon Egg
You collected every Blue Dragon Egg
You finished every HOP without using any hints
Well done! You saved the princess' life
You acquired the tiara
You freed Windy from captivity
Well done! You restored order to the Buried Kingdom!
You finished ten HOPs without using any hints
You collected every Green Dragon Egg
You restarted the furnace
You revealed a pathway through the forest
Well done! You helped Pomelo and his Dragon reconcile
You finished 10 Minigames without skipping any
Droi Helped you for the first time!
You became friends with Droi
You entered the Buried Kingdom
You finished a HOP in 60 seconds without using any hints
You revealed the Dragon Eye Amulet's special ability
You revealed the coordinates of the Buried Kingdom
You obtained the Dragon Eye artifact
You completed a Minigame without skipping it
You extinguished the fire in Julie's house
You finished every Minigame without skipping any
You found every morphing object
You found every collectible item