Hola, such a strange little metal gear community, but I'm not here to make fun, I actually try to stay away from the harder modes of the games. The only one that I have had success in the harder modes was Metal Gear Solid, where I polished off easy and normal without a sweat, then came hard mode, the maximum rations you can pick up is 2 throughout the game, the number never goes up like easy and normal. I still haven't beaten it, I get to the Rex battle and get pwned, usually cursing the fact that one more ration would've given me the win. Then I noticed what was below hard mode, a mode called extreme, I gulped and decided maybe I didn't want extreme to be unlocked. Well MGS2 and TS weren't much a of a problem but I did only play them on easy mode :). Now MGS3, on easy mode it's a pain in the ass (well especially if you're trying to get the boss camo by beating bosses with the tranquilizer gun), I read a guide on the difference between modes, the differences between easy, normal, and hard are small, bullets cause more damage, food doesn't last that long for stamina, blah blah blah. Then I noticed the differences between hard and extreme, guards can kill you in 2 shots, bosses have one hit kill capability, food is essential to survival, and so on. Sorry, I'm sure I scared the crap out of you with that, but anyway, I'm decent at the games so if you have any questions, feel free to ask, laters.
-The Big Boss Kamen