Please do not steal thewalkthroughs...
Here's how to read them:  If you are playing at AGENT, follow only the BLUE instructions.  If you are at SECRET AGENT, follow the BLUE and the GREEN.  If you are playing at 00AGENT, follow the BLUE, GREEN, and the RED instructions.  (all of them)
 
The Dam: Mission 1 Mission 2:  The Facility Mission 3:  The Runway Mission 4:  Surface 1 Mission 5:  The Bunker
Mission 5:  The Silo Not Yet Availible Not Yet Availible Not Yet Availible NOW AVAILIBLE!!!