I read that the boss battles are so difficult in this game that you are encouraged to play them (co-op) with the help of a friend, but I was able to complete all 33 main missions without help and I'm not the greatest gamer. But I am no stranger to MGS and have played all the games, I even bought a gamecube just to play Twin Snakes, and I think this game is a great addition but possibly not the most accessible. Read more