Here is the full list of all 24 Mosaic: Game of Gods achievements.
Complete pack 3
Play left-handed mode
Complete 10 levels in Fever Mode
Earn 15000 points in Fever Mode
Earn 8000 points in Fever Mode
Complete 5 levels in Fever Mode
Earn 1000 points in Fever Mode
Use 100 hints
Complete pack 2
Place 1000 fragments on the game board
Complete 40 levels with 3 stars
Place 500 fragments on the game board
Complete pack 1
Complete 20 levels with 3 stars
Place 100 fragments on the game board
Complete 5 levels in a row without making a mistake
Place 15 consecutive fragments on the game board without making a mistake
Complete pack 4
Complete pack 5
Complete pack 6
Complete 80 levels with 3 stars
Complete every level with 3 stars
Place 2500 fragments on the game board
Collect every trophy