Umn... The original Ghost Recons didn't have much of a storyline or plot. It did have a mission and goals though. They were mostly a series of maps that you got to go through to complete the mission. No rails or much of a plot.
They didn't even have vehicles that you could get into. As far as the newer ones, they where pretty good. My all time favorite from them must be rainbow 6v3 ravenshield. You could slowly open the door with the mouse wheel. Lean, prone, not on rails too much. Some of the maps where though. AI sucked.