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