Ghost Recon Cheats

To unlock people with better ratings, beat the X, or bonus objective
in each campaign level.

Successfully complete the first twelve missions in campaign mode to unlock all twelve heroes as playable characters in quick mission and campaign modes. They include Henry Ramirez, Nigel Tunney, Will Jacobs, Jack Stone, Guram Osadze, Susan Grey, Klaus Henkel, Buzz Gordon, Lindy Cohen, Astra Galinksy, Scott Ibrahim, and Dieter Munz.

Here's how you earn medals in the game:
Bronze Star: 15 kills
Congressional Medal Of Honor: 30 kills
Distinguished Service Cross: 25 kills
Purple Heart: Get wounded or killed
Silver Star: 20 kills