There are missions that are very difficult and can only be saved once per mission, so you will progress only through trial and error, but once you get the controls and everything you can do with it will be a little easier, not easy. This game has the best campaign I ever played in a game. And the two other official campaigns, Red Hammer and Resistance, are very, very good too. The immersion, the tension, the feeling of helplessness and the realism is incredible. Obviously time has passed and the graphics are completely out of date but believe me that will be the last thing you notice when you play this masterpiece.
