Here is the full list of all 20 Commander Cool 2 achievements.
Kill 1000 enemies
Die 1000 times
Die 100 times
Collect 100.000 coins
Collect 10.000 Coins
Complete all stone age missions
Collect all stone age diamonds
Complete all stone age levels
Kill the final stone age boss
Kill the boss in level 25
Escape the T-Rex in level 20
Kill 100 enemies
Beat level 15
Survive level 10
Collect 1000 coins
Kill 10 enemies
Kill the boss in level 5
Die 10 times
Play story with 2 players
Start the first stone age Level