According to a tweet by Hideo Kojima, the map for Metal Gear Solid 5: The Phantom Pain is “hundreds of times larger” than the map being used for its previous version, Metal Gear Solid: Ground Zeroes. The ground Zeroes map conjointly lacks real-time changes to the day and night cycle, though Kojima reportedly declared that every mission will provide totally different experiences.
The translation of the tweet also reads that “GZ is both a prologue to the MGS5 story and, at an equivalent time, a tutorial for a brand new MGS that passes to sneaking simulator.”