Gamasutra - GO3: Kojima Talks Metal Gear History, Future
Progress Through History
Kojima said he would show us this evolution using his games (primarily the Metal Gear series) as an example. In the 80s, non-abstract action games were primarily spaceship shooting games, such as Konami's Scramble. Metal Gear subverted this standard by not being about shooting - it was about "trying to form the tension of hide and seek".