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

  Cabin boy (5 points): Complete the tutorial. 
  Sailing Pretty (10 points): Win 7 stars in challenge mode. 
  Master and Commander (20 points): Win 15 gold stars in challenge mode. 
  Hoarder (10 points): Win every championship. 
  Big Booty (30 points): Unlock all the secret ships. 
  Salty Sea Dog (15 points): Win 25 games online. 
  Ram ram ram the boats... (15 points): Use the ram power up and kill two 
  opponents in one go with it. 
  Death From Above (15 points): Kill a non-airborne enemy while flying. 
  Admiral (20 points): Earn every type of medal. 
  Mine all mine! (30 points): Collect over 5000 mines. 
  Black Heart (20 points): Win 50 Matches in total. 
  Ka-boom! (10 points): Sink two enemies with a TNT.