Here is the full list of all 15 UFO vs Bikini achievements.
Capture 100 human
Crashed once
Capture 1000 human
Capture 5000 human
Capture 10000 human
GET 300 unbralla
Catch a bikini shooter
GET a car
Pull up 100 plants
Pull up 100 building
Pull up 1000 items
Pull up 3000 items
Pull up 100 giant rock
Pull up 100 ship
Complete tutorial