WOAH! i just got through playing the demo for this game and i must say... holy sh*t!!
this game is going to own!
because it takes place back in the 60's, there are no super technological things such as the radar that shows you were people are looking. you have to do everything manualy, which in turn takes more patience and effort.
you have to use survival techniques to stay alive and keep your stamina up to be consistant with your upperbody strength, accuracy, and running speed and what not.
a lot of Snakes equipment requires battery power which limits you to use them just whenever. you can change Snakes Camo and what not throughout the game to match the enviroment to help raise your "hidden" percentage. yes thats right, it shows you how much you are visible now so you can tell if you are not going to be seen or if you are in danger.
i just love the game and i have always been a big a55 fan of the storyline of the MGS series so i am going to love this game so much when it comes out. :D :D :D
There's already a thread on this subject... and by the way, there is a "radar" in the game. But it is available only through an item that you can eventually find in the game, but it's able to be used right off the bat in the demo.