Here is the full list of all 21 Catmaze achievements.
Get the good ending
Open 100% of the map
Bring the pig back to the village
Help the guardian at the West
Help the guardian at the East
Find all the spheres of the Veles God
Find all the spheres of the Dawn Goddess
Travel to Chernobog's world
Help the priest
Help kids to save their father
Find all the prayer stones
Find a guy from another game
Upgrade all the bracelets
Take Lesavka with you
Bring your furniture back
Save Tverdomir
Banish ghosts from a house in the north
Defeat Liho
Start a real adventure
Visit Mara without helping anyone
Get the bad ending