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

  Clear the Fifth Generation (100 points): Aim to clear the fifth generation. 
  Clear the First Generation (25 points): Aim to clear the first generation. 
  Clear the Fourth Generation (50 points): Aim to clear the fourth generation. 
  Clear the Second Generation (50 points): Aim to clear the second generation. 
  Clear the Third Generation (50 points): Aim to clear the third generation.