the man simply calls for that general that appears in all the others metal gears and call a little help , since the beggining of the game he is calling for big help , but the only thing that comes to help snake are ridiculous thing like small guns , but when he sees what the metal gear can do he immediately warns big boss that if he do anything they will counter attack with many nukes , in fact they dont lauch any thing in the end , but big boss said that they could launch anything they want and that the metal gear can take everything and would still be standing .The six nukes thing was because i dont really believe it could take dozens of nuke , than i reduzed the numbers . And snake is more intelligent , he call for help to destroy the island and your mission is keep running till this helps come , it was not a nuke , but it was a huge bomb that exploded the entire island but let metal gear intact , than big boss start laughing about it , but than snake said something like : The metal gear still hasnt an aquatic mode , has it? . i dont remember the words exactly , but it was something like that , than big boss stop laughing and see that the metal gear would fall into the darkest pit of the sea , and there is nothing he can do , he runs for a secure place together with gray fox but snake follow them , and when they meet each other snake burns gray fox and kill big boss , and the metal gear boss is one of the weakest one , i will ave to admit that the big boss fight is a lot more difficult