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

  Sun Tzu (20 points): Let your crew do the dirty work. 
  Fragile Alliance (10 points): Complete the first level in co-op. 
  No Going Back Now (30 points): Go to the point of no return in co-op. 
  End of the Road (50 points): Complete the game in co-op. 
  Impact (20 points): Escape from death row. 
  Damned if you do (20 points): Let them burn. 
  Damned if you don't (30 points): No rest for the wicked. 
  Iron Flower (50 points): Complete the game on hard. 
  Crowd Control (30 points): Surgical precision in the nightclub. 
  Have Gun, Will Travel Part I (20 points): Travel into the Rising Sun. 
  Have Gun, Will Travel Part II (20 points): Counter-revolution. 
  Have Gun, Will Travel Part III (20 points): The Beginning of the End. 
  Behemoth (10 points): Stop the roaring beast. 
  Pushblade Symphony (20 points): Points for getting up close and personal. 
  Frag Out (20 points): 5 with one fragmentation grenade. 
  Headmaster (10 points): 47 headshots. 
  By the Grace of.. (10 points): Lynch puts them out of their misery. 
  Boomstick (20 points): Shotgun messiah. 
  Return to Sender (10 points): Throw back enemy grenades. 
  Teflon (20 points): Avoid damage on a level. 
  Bulletproof (10 points): Avoid using adrenaline on a level. 
  Revenge Part I (20 points): Silencing the silent one. 
  Revenge Part IV (20 points): Shouldn't have gotten personal. 
  Revenge Part V (30 points): Glad it got personal. 
  Hindsight (10 points): Get that bird out of the sky. 
  Berserkopath (30 points): Make the most of Lynch's condition. 
  Bullseye (20 points): Lynch reacts fast at the Exchange. 
  Family Member (5 points): Complete a Fragile Alliance session. 
  Some (5 points): Escape with $50,000 from a Fragile Alliance heist. 
  A Lot (15 points): Escape with $1,500,000 from a Fragile Alliance heist. 
  Sweet Revenge (5 points): Get personal revenge in Fragile Alliance. 
  Crime Buster (10 points): Kill 10 traitors in Fragile Alliance. 
  Double Trouble (25 points): Kill 2 traitors in a Fragile Alliance round. 
  Never Give Up (30 points): Get 3 personal revenge kills in a Fragile Alliance 
  session.