i just beat the ocelot team (after you meet eva), time: 7h,37mins
aparently to get the best rank in the game: foxhound. you must finish the game on euro extreme, in under 5 hours, losing no more than 4 bars of health, saving under 20 times, no special items, not being seen (duh, its game over if you are) and not killing ANYONE (including bosses).
hardcore O_O