Themes in the Metal Gear series

In the Metal Gear series there are themes in each of the canon Metal Gear games. Most of the themes play an important part of the story in the game. Metal Gear creator Hideo Kojima has said that the themes are messages that can be passed on to the next generation. By the end of the game the themes lead to a conclusion.

Metal Gear Solid
In Metal Gear Solid the main theme was genes. Through out the game it is said that everyone is bound to their genes and to fate and that the only thing that matters is passing on genes to the next generation. The games main antagonist Liquid Snake, Solid Snake's brother and polar opposite, wanted Big Boss body to save the Gennome soldiers from a genetic disease, follows his genes and is what Snake could have become. By the end of the game Naomi Hunter ,who has always studied genes, comes to the conlusion that genes and the fact that Snake is a clone is not important.

Metal Gear Solid 2: Sons of Liberty
In Metal Gear Solid 2: Sons of Liberty the main theme was memes.At the end of the game it is revealed that Raiden has been a test subject for the S3 Plan which is a recreation of the Shadow Moses Incident. Solidus Snake who is a clone ,who cannont have children, wants to be remembered cannot leave any memes behined thanks to the Patriots nature ,which is his reason for fighting them. At the end of the game it is shown that good things can be passed on to the next generation ,not just the bad things. At the end of the game Raiden and Rosemary plan to pass on good things to their child.