Why Is the Hardest Difficulty in Metal Gear Solid Called European Extreme Note that enemies have the aforementioned range of vision on Hard and regular Extreme. From right to left: Very Easy, Easy, Normal and Difficult/Extreme. The enemy range of vision is very long on E-Farthermost. From correct to left: Very Easy, Like shooting fish in a barrel, Normal, Hard/Extreme and E-Extreme. Difficulty Very Like shooting fish in a barrel Like shooting fish in a barrel Normal Difficult Extreme Eastward-Extreme