Complete the following achievements to unlock Xbox Live 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.