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