Well......Snake may have a rude side, but he aint never gonna be a bad guy in the game.
As for Meryl getting killed, there are some chances for that to happen, as in Japanese story lines, they love killing the female so the hero gets a sad more touchy ending.
But HEY, hasn't that already happened. In MGS1....... Meryl either dies or lives. So I dont think Konami would repeat something like that. Not with Meryl. And even if it does......... it may have the same "Multiple Ending" thing.
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