But regarding the game itself, i was fighting with The End, a game-boss and member of the Cobra unit, born in the early 1860s. He was instanly sniping me from his Mosin-Nagant rifle, and since i'm pretty noob in such games i couldn't find him inside that freakin forrest (he's really good camouflaged).
After getting seriously injured (few times), i've googled for some hints. And firsty i couldn't belive. This boss is really old, even his parrot names him as Grandpa, so the hint uses this fact very directly. In order to pass him away (one of the ways) you need to save your game, reset your console, change the system date (one week forward) and reload the save. And guess what, when you reload it The End will simply die because of an old age. For me that was a really, really incredible game plot, holy cow. I havent seen such thing yet.
If you are a music fan, you should also test "Snake Eater" song, performed by Cynthia Harrel:
And if you haven't played the Metal Gear Solid series so far, go and do so, they are really worth it. Thank you Mr. Hideo Kojima, this rocks.