Last week during a speaking engagement at BAFTA, Hideo Kojima responded to a question regarding the future of Metal Gear Solid games. He was asked if the future of Metal Gear was heading towards an open world concept since each of the games allow players more and more freedom withe each new installment. Kojima responded by saying this:
First of all if you give somebody a mission, and say your mission is to go and rescue this person, already you create some drama there. However if you take that a step further and say give the person the power to decide how they get there, what time they arrive, what kind of path they use to sneak into the base then it creates even more drama and gives them more freedom. So it’s not so much that I’ve been aiming to create an open world game so much as I just want to give players the freedom to do things in a way that feels natural to them.
Up until this point, if you had a hundred people and you made them play a game, they’d all basically arrive at the same time, take the same route, use the same equipment to get the job done. But what I want to do from this point on is give people the freedom, so if you have a hundred people and you give them this mission then they’ll all come back with a hundred different stories.
They may arrive at a different time, use a different route to get into the base, use different weapons and equipment. So rather than having one great, dramatic story you have a hundred. That’s really what I want to accomplish. So it’s not necessarily that I’m aiming for open world, that’s not the [be all and] end all, what I want to do is give people the freedom to create their own stories and create something that’s very personal to them. That’s what I want to accomplish.
You can read the rest of Kojima's lecture here