1) Because its Snake and Snake knows how to counter Grey Fox / Olga / Raiden ....
2) Maybe Snake doesn't want all the guards to know where he is... and the guards arn't more alert because maybe the haven't heard the news / are stupid...
3) Their Nanomachines are talking for them...
4) Well firstly stealth camo would ruin game play. Secondly it has no effect on infra-red and you CAN buy stealth camo off Drebin in MGS4.
5) If they killed Snake and the game ended it would suck.
6) Yea Otacon is one unlucky guy...
7) Metal Gear RAY is an anti-metal gear. As such it is designed to be used against REX and not infantry... and so Raiden was able use a rocket launcher to hold off the Metal Gear RAY's until Emma's virus killed them... in short he merely survived and didn't kill the RAY units ...
8) Well if Big Boss couldn't change camo quickly then MGS3 would sucked wouldn't it ... imagine needing to find a nice quiet spot to spend 1 - 2 mins changing camo every 60 second...
9) Health items recover health because ... well they just always have. As for why Kojima decided not to re-use MGS3's system -- alot of people complained that MGS3's system was just a waste of time and wanted Kojima to drop it...
10) Snake holding the gun is factored into the camo index... and the PMC's do hear you firing the gun unless its silenced... and they will find you if your not using a quiet weapon (like tranq gun) ...
11) Its called the "Magic Satchel" concept. - http://en.wikipedia.org/wiki/Magic_satchel
