Here is the full list of all 31 Sonya: The Great Adventure achievements.
Come back home
Fix the flying machine
Complete the whole game without a hint
Complete all HOGs without hint
Drive away the spider
Complete the electric box minigame without skip
Reach the other side of the cliff
Complete the gear minigame without skip
Watch all cut scenes in the game
Defeat the dark lord
Restore the broken green orb
Find and open all portals
Make the restoring potion
Complete the atom minigame without skip
Open the door in the gallery
Complete the constellation minigame without skip
Complete the safe door minigame without skip
Cook the magic potion to move the roots
Find the secret pass behind the fireplace
Get rid of the violet darkness on the tree
Complete the pirate chest minigame without skip
Rescue the wolf cubs
Complete the bridge minigame without skip
Get rid of the red darkness on the bridge
Find the way in the forest
Make protective glasses
Get rid of the darkness in the living room
Complete Tutorial
Combine two items to gain a third
Complete the organ minigame without skip
Complete all minigames without skip