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