Here is the full list of all 10 I.F.O achievements.
Kidnap 500 aliens.
Rescue 500 animals.
Shoot down 500 UFOs.
Play over 500 games.
Shoot down battle ship.
Shoot down the octopus.
See the step roll to the end.
Score reached 50,000 points.
Score reached 100,000 points.
Score reached 300,000 points.