Ghost Recon: Future Soldier takes place in the near future. A dirty bomb has taken out a Ghost team, and another Ghost team (consisting of Kozak, Ghost Lead, Pepper, and 30k) is tasked with tracking down the source of the dirty bomb using advanced technology. During the campaign, the Ghosts will visit places such as Nigeria, Pakistan, Russia and Norway.
Game ruining glitch that hasn't been fixed yet where the player loses everything that they unlocked if they leave the current game (and the game is dependent on what the player unlocks)
At that, the levels are frustratingly linear, and never fully explained beforehand (as you'd expect being a soldier). At that, every level I've played has a rail shooter portion near the end of the level, where the player protects a certain character in the midst of a chaotic situation.