During the Gamescom Preview Event, Kojima announced the studio is bringing both Ground Zeroes and The Phantom Pain to Steam. The reveal was done through a video showing Snake in a Steam themed box. Kojima also said this box will be in the game, and will have its own uses. https://www.youtube.com/watch?v=f9c5vvQBUYY While it's too early for a release date, Kojima did say Ground