On his radio show KOJI10, Kojima described two game ideas he would…

“I'd also like to make a game to play in zero gravity. […] So the controls would have to change. […] I'd work out the gameplay and the controls.”

“In other words, I'm trying to create a game that will have a small but positive affect on players' actual lives. I know it sounds a little dramatic, but that's what I've been thinking about for a long time now.”

“The key to all of it, is the live element. Video games are a form of media in which the developer tries to create an experience that will bring joy to the player. [...] But in doing so there's an element of compulsion, of the player merely re-tracing the path the developer has laid out in advance for them.”

“I thought that I could never recover. I felt like I might not ever be able to create a game again.”

“this is exactly the kind of thing I have always wanted to create. Not a game merely played to "pass the time", but something that would be important to one's own life experience.”