Achievements:

Accomplish the indicated achievement to get the corresponding number
of Gamerscore points:

 Clear Round 4 (10 points): Clear Round 4. 
  Clear Round 8 (20 points): Clear Round 8. 
  Clear Round 12 (25 points): Clear Round 12. 
  Clear Round 16 (30 points): Clear Round 16. 
  No-Miss (Round 7) (40 points): Clear the first 7 rounds without losing a life. 
  Extend (10 points): Score 20000 points and gain an extra life. 
  Double Extend (20 points): Score 100000 points and gain a second extra life. 
  Special Flag (5 points): Collect the Special Flag. 
  Special Flag First (10 points): Collect the Special Flag before collecting any 
  other flag. 
  No-Miss Special Flag (15 points): Collect the Special Flag before collecting 
  another flag and finish the stage without losing a life. 
  Lucky Flag (5 points): Collect the Lucky Flag. 
  Fuel Bonus (10 points): Collect a Lucky Flag with more than half fuel 
  remaining.