Here is the full list of all 18 Parkland achievements.
Pass through 30 missions
Pass through 100 missions
Pass through 150 missions
Pass through 200 missions
Pass through 300 missions
Pass through 500 missions
100 creatures found
500 creatures found
1000 creatures found
3000 creatures found
100 rabbits found
500 rabbits found
1000 rabbits found
3000 rabbits found
Gain the hoverbike
Gain the ufo
Find the mini monster
Find the skyport