Here is the full list of all 24 Mosaic: Game of Gods achievements.
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 1
Complete pack 2
Complete pack 3
Complete pack 4
Complete pack 5
Complete pack 6
Complete 5 levels in Fever Mode
Complete 10 levels in Fever Mode
Complete 40 levels with 3 stars
Complete 80 levels with 3 stars
Complete every level with 3 stars
Use 100 hints
Place 500 fragments on the game board
Place 1000 fragments on the game board
Place 2500 fragments on the game board
Earn 1000 points in Fever Mode
Earn 8000 points in Fever Mode
Earn 15000 points in Fever Mode
Play left-handed mode
Collect every trophy