Here is the full list of all 14 Caveman World: Mountains of Unga Boonga achievements.
75 Stars Earned
Complete All Levels
Break 50 Eggs
50 Stars Earned
Gather 1,500 Collectibles
Break 25 Eggs
Gather 1,000 Collectibles
Break 10 Eggs
25 Stars Earned
Gather 500 Collectibles
Use Star Trader to add +1 Life
Gather 250 Collectibles
Use Star Trader to add +1 Energy
Gather 100 Collectibles