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

The Flow of Combat I (150 points): Achieve a Hit Counter of 10. 
The Flow of Combat II (150 points): Achieve a Hit Counter of 20. 
The Flow of Combat III (200 points): Achieve a Hit Counter of 30. 
The Art of Combat (200 points): Achieve a Hit Counter of 40. 
One with Combat (300 points): Achieve a Hit Counter of 50.