I recently finished playing "Metal Gear Solid: Peace Walker" for the PSP. I found it to be a great game that fairly explains Big Boss's story. I've logged over 20 hours and am still ready to keep playing. Many reviewers criticized the game for it's insane difficulty spikes. They demanded that you need a second player to beat some of the segments. But, I never once needed another player to get through it. I don't know if it's because I've played every Metal Gear Solid made, or the reviewers just aren't that good? Did anyone have problems with the difficulty?