Here is the full list of all 26 Derpy Dinos achievements.
Travel around the island 300 times
Kill 10,000 dinos
Score 200,000 10 times
Kill 20,000 villagers
Kill 2,000 dinos
Collide every item combination
Slow time 60 times
Restore ship health 30 times
Smash 50 meat sacks with the same volcano rock
Reach the top of the local high score list
Reach wave 11
Earn a point bonus of 20,000
Kill 5,000 villagers
Complete a wave > 5 in < 5 seconds
Throw and catch the same volcano rock twice
Kill 300 dinos
Earn 30,000 points in the first 30 seconds
Catch something around the world
Kill 1,000 villagers
Throw and catch the same stack of 5 villagers together
Get hit 60 times in one round
Hit yourself with a meatsack 10 times
Do no harm for 30 seconds
Catch a volcano rock
Collide two sacks of meat together
Shoot 15 dinos in less than 15 seconds