No missable achievements (plus 10 unknown)
Sign in with Steam or Xbox to track your progress, and:
Perform a double abduction.
Abduct a cow.
Abduct 50 Earthlings in one game.
Smash 3 Earthlings with one dropped object.
Complete the farm level without dying.
Score 50,000 points.
Complete the Story Mode.
Splatter 50 flying creatures in one game.
Score 100,000 points.
Complete all Score Attack waves.