but hews just doing what you are sharky

No, what I am saying is you need to translate said character over to the other world. Sure if you don't do that then "theoretically" MC would win(they would still never meet and therefore never do battle). Write to Nintendo. The next Super Smash Brothers should include MC. Then we will see who truly is better.

lets see if snake can withstand a drop from orbit.

Cosmic Spiderman would put up a good fight vs Superman...   

Even Batman has beaten Superman before. 

Its all about preperation.  Could Snake prepare better for MC then MC could prepare for Snake?  Could Snake get lucky 1 out of 10 fights?  A bullet to the head can still kill MC right?

Also I don't think you should pull the books into this. As far as I know. In the games even single player you cant just stand there and let the bad guys beat you and you never die. He is easy to kill in the games. So all parts from books are removed. And you only take what the games show you. It tells me snake just has to punch him twice and MC is dead. :]

Only if those punches are coming from an immensely strong alien Elite/Brute, or another Spartan.  Regular marines wouldn't even cause a thud punching into his armor.

He is only easy to kill if you play on Legendary difficulty.  Otherwise he can absorb like 50 plasma shots before dying.  And in multiplayer, they are all spartans or elites, thus all immensely stronger than Snake could ever be, so Snake's punches would have no affect.

Nope. No proof anywhere that those brutes are stronger then snake. For all you know, Snake could pick up a house and eat it.

LOL Solid Snake has far too many items /weapons at his disposal to be worried about Master Chief .

Snake would destroy master chief before he could even blink.

snake!!!!!!